Japan cooperative-banking unified federation matrix

TL;DR

Japan’s “cooperative-finance” lane is not one system. There are five distinct federation-anchored systems sitting under three different ministries and three different statutes: JA Bank (497 JA + 31 Shinnoren + Norinchukin under the Agricultural Cooperatives Act / Norinchukin Bank Act, joint FSA + MAFF), JF Marine Bank (71 JF + 10 JF Shingyoren + Norinchukin under the Fishery Cooperatives Act / Norinchukin Bank Act, joint FSA + MAFF), 信用金庫 (254 shinkin + Shinkin Central under the Shinkin Bank Act, FSA), 信用組合 (143 shinkumi + 全信組連 under the Act on Cooperatives of SMEs + the Kyokin Act, FSA + prefecture), and 労働金庫 (13 rokin + 労金連 under the Labour Bank Act, joint FSA + MHLW). Each federation has its own statute, supervisor mix, member-eligibility rule, central-institution role, deposit-insurance pathway, and BoJ access. This matrix puts all five side by side so the “which cooperative system” question can be answered without flattening them into “shinkin and other”.

Wiki route

This entry sits under banking index and is the cooperative-system counterpart to the licence-tier surface Japan banking-license tier comparison matrix. The general framing of the lane is in Cooperative banking in Japan. The five member-population indices are JA Bank system, JF Marine Bank system, Japan shinkin bank registry, Japan credit cooperative registry, and Japan rokin bank registry. The central institutions are Norinchukin, Shinkin Central, National Federation of Credit Cooperatives (Zenshinkumiren), and Rokin Renraku. The JA non-credit federations sit at JA Zenchu (National Central Union of Agricultural Cooperatives), Ja Zen Noh, and Ja Kyosairen; the JF non-credit federations are JF Shingyoren (Credit Federations of Fishery Cooperatives / Prefectural Credit Federations of Fishery Cooperatives) (federation-layer route) and Jf Zengyoren. The deposit-insurance anchors are Yokin Hoken Kiko for shinkin / shinkumi / rokin and the 農水産業協同組合貯金保険機構 parallel regime for JA / JF.

Why this matrix matters

Treating “cooperative finance” as one category is the single most common error in Japan financial-system mapping. The five systems do not share statutes, do not share supervisors, do not share central institutions, and do not share deposit-insurance pathways. A confidence judgement on a JA cash flow has to start from the Norinchukin Bank Act + the Agricultural Cooperatives Act; a confidence judgement on a shinkin cash flow has to start from the Shinkin Bank Act + the FSA SME / regional guideline. The two questions are answered by different ministries, different inspection programmes, and different liquidity backstops.

Specifically, this matrix matters because:

the statute controls almost every other field (capital floor, governance, holding-company route, BoJ access);
the supervisor mix determines which ministry guideline / inspection cycle the institution lives under (FSA-only, FSA + MAFF, FSA + MHLW, FSA + prefecture);
the central-institution shape determines whether the system has a 特殊法人 (Norinchukin) or a member-owned 協同組織 central (Shinkin Central, 全信組連, Rokin Renraku);
the deposit-insurance pathway is different — DICJ for shinkin / shinkumi / rokin; the 農水産業貯金保険機構 for JA / JF — and that affects depositor-protection language in disclosure;
the BoJ counterparty is the central institution (not the member cooperative), so liquidity-channel maps must terminate at the federation, not at the local cooperative;
the system-level AUM (especially Norinchukin ¥80-100tn-class and Shinkin Central ¥40-50tn-class) makes these federations among the largest institutional investors in Japan, sitting alongside megabank balance sheets but with very different mandates.

This entry should be read together with the licence-tier matrix Japan banking-license tier comparison matrix — the licence-tier matrix slices the whole deposit-taking universe horizontally by licence shape, while this matrix slices the cooperative lane vertically by federation system.

Cross-system comparison table

| Dimension | JA Bank (JA Bank system in Japan) | JF Marine Bank (JF Marine Bank system in Japan) | 信用金庫 (shinkin) | 信用組合 (shinkumi) | 労働金庫 (rokin) | |---|---|---|---|---|---| | Statute (member layer) | Agricultural Cooperatives Act (1947) | Fishery Cooperatives Act (1948) | Shinkin Bank Act (1951) | Act on Cooperatives of SMEs, etc. (1949) + Act on Financial Businesses by Cooperatives (1949) | Labour Bank Act (1953) | | Statute (central layer) | Norinchukin Bank Act (1923 / 1986 / 2001) | Norinchukin Bank Act (shared) | Shinkin Bank Act | Act on Cooperatives of SMEs + Act on Financial Businesses by Cooperatives | Labour Bank Act | | Primary supervisor | FSA + MAFF (joint) | FSA + MAFF (joint) | FSA + Local Finance Bureau | FSA + prefecture | FSA + MHLW (joint) | | Member-cooperative count | 497 JA (as of 2025-04 Norinchukin disclosure) | 71 JF | 254 shinkin (FSA 令和7年11月6日) | 143 shinkumi (FSA 令和8年2月20日) | 13 rokin | | Federation / prefectural layer | 31 prefectural JA Shinnoren (信連) | 10 JF Shingyoren (信漁連) | None at the prefectural credit layer (shinkin go direct to 信金中金) | None at the prefectural credit layer (shinkumi go direct to 全信組連) | None at the prefectural credit layer (rokin go direct to 労金連) | | National central institution | Norinchukin | Norinchukin (shared with JA) | Shinkin Central | National Federation of Credit Cooperatives (Zenshinkumiren) | Rokin Renraku | | Central legal form | 特殊法人 (Norinchukin Bank Act) | 特殊法人 (shared) | 協同組織金融機関 (member-owned) | 協同組織金融機関 (member-owned) | 協同組織金融機関 (member-owned) | | Member eligibility | Agricultural cooperatives (agricultural co-op membership: farmers + associate members) | Fishery cooperatives (fishery co-op membership: fishers + associate members) | Trade area / region / occupational area (resident, worker, or business in the 営業地区) | Trade area / region / occupational area (often tighter — single industry / region / occupation) | Labour unions, consumer-livelihood cooperatives, member-affiliated persons | | Deposit terminology | 貯金 (chochiku / chokin) | 貯金 (shared with JA) | 預金 (yokin, like ordinary banks) | 預金 | 預金 | | Deposit insurance pathway | 農水産業協同組合貯金保険機構 | 農水産業協同組合貯金保険機構 (shared) | DICJ | DICJ | DICJ | | Insurance coverage limit | ¥10m principal + interest (parallel to the DICJ structure) | ¥10m + interest | ¥10m + interest (DICJ standard) | ¥10m + interest | ¥10m + interest | | Lending scope | Member agricultural / household / business + non-member subject to caps | Member fishery / household / business + non-member subject to caps | Member SME / household + 50% non-member cap historically | Member SME / household (tighter member rules) | Member household + workplace finance (mortgage / education / life-event) | | BoJ counterparty | Norinchukin direct (system clears through 農中) | Norinchukin direct (shared) | Shinkin Central direct | 全信組連 direct | Rokin Renraku direct | | Holding-company route | None (cooperative-system structure) | None | None | None | None | | Geographic constraint | Local JA = municipality / region; Shinnoren = prefecture; 農中 = national | Local JF = port / region; Shingyoren = prefecture; 農中 = national | Statutory 営業地区 = municipality / prefecture | Statutory 営業地区 (often industry / community) | 13 regional rokin cover Japan together (no overlap) | | System-level AUM | Norinchukin ~¥83tn total assets (FY2024); system-wide JA 貯金 ~¥107tn (2025-03, JA Bank) | Norinchukin shared; JF 貯金 considerably smaller scale | Shinkin Central ~¥48tn (2025-03); sector deposits ~¥161tn (2024-03, 254 shinkin) | 全信組連 smaller scale; sector deposits ~¥24tn (2025-03) | Rokin Renraku 資金量 ¥6.2tn (2025-03 disclosure); sector deposits ~¥23tn (FY2024) | | Recent consolidation pattern | Continuous JA mergers within prefectures; the 497 figure has declined from > 1,000 over the past 25 years | JF mergers ongoing; the 71 figure has declined from a much larger historical base | 254 down from ~400+ over the past 25 years via shinkin-to-shinkin mergers | 143 down from a much larger historical base; some inter-cooperative mergers | 13 stable since the 1998-2003 regional consolidation pulled the prior 47-prefecture rokin map down to 13 regional rokin | | Non-credit sister federations | JA Zenchu (National Central Union of Agricultural Cooperatives) (audit / representative), Ja Zen Noh (commercial), Ja Kyosairen (mutual aid) | Jf Zengyoren (representative / commercial) | Industry body: Zenshin Kyo | Industry body: 全国信用組合中央協会 | Industry body: 全国労働金庫協会 |

JA Bank — 農業協同組合系統 (JA Bank system)

Statute. The Agricultural Cooperatives Act (Act No. 132 of 1947) for local JA and prefectural Shinnoren credit business; the Norinchukin Bank Act (current consolidation 1986, major amendment 2001) for Norinchukin.
Supervisor. Joint FSA + MAFF — the cooperative banking system whose primary regulator is not FSA-only. Practical supervision splits inspection (FSA-led for credit-business JA / Shinnoren) and policy / cooperative-charter aspects (MAFF-led).
Layer count (2025-04, Norinchukin disclosure). 497 JA at the local layer, 31 Shinnoren at the prefectural layer, 1 Norinchukin at the national layer.
Central institution. Norinchukin — a 特殊法人 under the Norinchukin Bank Act; not a 株式会社; not listed; capitalized through 系統 (系統団体出資) by the JA Group, the JF Group, and forestry-cooperative bodies. Operates as the system-wide central bank, the system-wide institutional investor (>¥80tn AUM class), and the BoJ counterparty for the cooperative system.
Member type. Local JA serves farmer members (正組合員) and associate members (准組合員 — non-farm residents who use JA services). The credit-business JA acts as the cooperative-finance front door.
Deposit terminology. Uses 貯金 instead of 預金, which traces back to the cooperative-statute terminology distinct from Banking Act 預金. Functionally equivalent for users.
Deposit insurance. 農水産業協同組合貯金保険機構 (Agricultural and Fishery Cooperative Savings Insurance Corporation) — a parallel insurance vehicle separate from DICJ but designed on parallel ¥10m + interest principles. Practical depositor-protection language is equivalent.
Lending scope. Mainly member-tied (agricultural finance, household finance for members, regional SME) plus the Norinchukin portfolio at the national layer, which is a major fixed-income / cross-border investor by mandate.
Non-credit sister federations. JA Zenchu (National Central Union of Agricultural Cooperatives) (audit, representative, agricultural-policy advocacy); Ja Zen Noh (commercial federation — fertilizer / feed / products); Ja Kyosairen (cooperative mutual-aid insurance).
Recent / Notable issues. 2024-06 Norinchukin announced ~¥1.2tn capital strengthening tied to US Treasury / structured-credit unrealized losses; 2025 follow-on portfolio restructuring. This is the most important post-2008 system-level public event for the JA Bank lane.

JF Marine Bank — 漁業協同組合系統 (JF Marine Bank system)

Statute. The Fishery Cooperatives Act (Act No. 242 of 1948) for credit-business JF and JF Shingyoren; the Norinchukin Bank Act (shared with JA) for Norinchukin.
Supervisor. Joint FSA + MAFF (shared regulatory architecture with the JA Bank lane).
Layer count (2025-04, Norinchukin disclosure). 71 credit-business JF at the local layer, 10 JF Shingyoren (Credit Federations of Fishery Cooperatives / Prefectural Credit Federations of Fishery Cooperatives) at the prefectural / regional layer, 1 Norinchukin at the national layer (shared with JA).
Central institution. The same Norinchukin as JA. The JF-side prefecture-equivalent layer is JF Shingyoren (Credit Federations of Fishery Cooperatives / Prefectural Credit Federations of Fishery Cooperatives); the non-credit national federation is Jf Zengyoren (sales, representative).
Member type. Local fishing cooperatives (organized by fishing port / fisheries region). Members are fishery households, fisheries businesses, and fisheries-community members.
Deposit terminology. 貯金 (shared with JA cooperative terminology).
Deposit insurance. 農水産業協同組合貯金保険機構 (shared with JA — the same parallel system, not DICJ).
Lending scope. Fishery-business finance, vessel financing, fisheries-household finance, processing / sales cooperative finance, plus the national Norinchukin portfolio.
Geographic constraint. Local JF = port / coastal region; JF Shingyoren = prefecture; Norinchukin = national.
Why it’s a distinct system. Even though JA and JF share Norinchukin at the apex, the statute is different (Fishery Cooperatives Act ≠ Agricultural Cooperatives Act), the JF representative federation Jf Zengyoren is not part of JA Zenchu (National Central Union of Agricultural Cooperatives), and the prefectural JF Shingyoren (Credit Federations of Fishery Cooperatives / Prefectural Credit Federations of Fishery Cooperatives) is structurally distinct from JA Shinnoren. The two systems should not be flattened into “農林系統” in operating analysis.

信用金庫 — Shinkin system (Japan shinkin bank registry)

Statute. The Shinkin Bank Act (Act No. 238 of 1951; comprehensive enforcement 1958).
Supervisor. FSA + Local Finance Bureau (under the FSA’s SME / regional financial-institution supervision guideline, Part V on 協同組織金融機関). Not a joint MAFF / MHLW supervision regime — shinkin sit entirely inside the FSA cooperative-finance lane.
Layer count. 254 licensed shinkin (FSA 信用金庫免許一覧, as of 令和7年11月6日) + 1 Shinkin Central central institution. Down from the 1990s peak (~400+) through continuous shinkin-to-shinkin mergers under Shinkin Bank Act procedures.
Central institution. Shinkin Central — a 協同組織金融機関 (member-owned by 254 shinkin), not a 特殊法人. Total assets ~¥48tn (2025-03末 disclosure). Acts as the system liquidity pool, the system institutional-investor vehicle, the BoJ counterparty for the shinkin system, and the operator of the Shinkin Cash Service (SCS) ATM network.
Member type. Members must reside, work, or have a business in the shinkin’s statutory 営業地区. Local SME and household-finance focus.
Deposit terminology. 預金 (Banking Act terminology, unlike JA / JF 貯金).
Deposit insurance. DICJ — the standard banking deposit-insurance regime applies.
Lending scope. Member-eligible local SMEs, member households, member-region settlements and consumer finance. The historic 50% non-member lending cap is the structural anchor (with carve-outs).
Industry body. Zenshin Kyo for industry representation.
Recent / Notable issues. The same 2021 Banking-Act-era cooperative-finance reform expanded affiliated-company scope; ongoing system-wide consolidation continues to compress the 254 count. Several individual shinkin have entered FSA business-improvement supervision; the system-stability backstop is via Shinkin Central support and DICJ resolution tools.

信用組合 — Shinkumi system (Japan credit cooperative registry)

Statute. The Act on Cooperatives of SMEs, etc. (Act No. 181 of 1949) plus the Act on Financial Businesses by Cooperatives (Act No. 183 of 1949). The cooperative-credit-business dual-statute structure is distinct from the shinkin single-statute structure.
Supervisor. FSA + prefecture (prefectural authorities). Practical inspection is FSA-led for system supervision and prefecture-led for cooperative-charter and member-eligibility aspects. The dual-supervisor split between the FSA and the prefecture is distinct from shinkin (FSA-only).
Layer count. 143 licensed shinkumi (FSA 信用組合認可一覧, as of 令和8年2月20日) + 1 National Federation of Credit Cooperatives (Zenshinkumiren) central institution. Down from a much larger historical base through cooperative-to-cooperative mergers.
Central institution. National Federation of Credit Cooperatives (Zenshinkumiren) — a 協同組織金融機関 (member-owned by 143 shinkumi), parallel in form to Shinkin Central for the shinkumi system.
Member type. Cooperative members organized by industry (業域 — single-industry / trade-group cooperatives), region (地域), or occupation (職域). Member eligibility is tighter than shinkin. Includes industry-specific cooperatives (e.g. transport cooperatives, ethnic-Korean / ethnic-Chinese commercial cooperatives, doctor / dentist professional cooperatives).
Deposit terminology. 預金.
Deposit insurance. DICJ coverage applies on standard terms.
Lending scope. Member deposits and member lending only (no statutory non-member cap allowance equivalent to shinkin’s 50% rule). A tighter franchise than shinkin in practice.
Geographic / occupational constraint. Statutory business area. Many shinkumi serve a specific occupation or industry rather than a geographic prefecture.
Industry body. 全国信用組合中央協会 (representative / industry body separate from the 全信組連 central-banking entity).

労働金庫 — Rokin system (Japan rokin bank registry)

Statute. The Labour Bank Act (Act No. 227 of 1953).
Supervisor. Joint FSA + MHLW (Ministry of Health, Labour and Welfare). The MHLW joint-supervision shape is unique inside the deposit-taking universe — no other cooperative-finance lane has MHLW supervision.
Layer count. 13 licensed regional rokin (FSA 労働金庫免許一覧) + 1 Rokin Renraku central institution. The 13-regional-rokin map (中央労金, 近畿労金, 東海労金, 北海道労金, 東北労金, 新潟県労金, 長野県労金, 静岡県労金, 北陸労金, 中国労金, 四国労金, 九州労金, 沖縄労金) replaced the prior 47-prefecture-rokin map through the 1998-2003 regional rokin merger wave.
Central institution. Rokin Renraku — a 協同組織金融機関 (member-owned by 13 rokin), parallel in form to Shinkin Central / 全信組連. 資金量 ¥6.2tn (2025-03 disclosure) and 出資金 ¥1,600億; financial institution code 2950.
Member type. Members are labour unions, 生活協同組合 (consumer-livelihood cooperatives), and persons affiliated with member organizations. Individual depositors join via their member organization.
Deposit terminology. 預金.
Deposit insurance. DICJ coverage applies.
Lending scope. Strongly tilted toward household / worker finance — mortgages, education loans, automotive loans, consumer loans, and life-event finance for worker members. Commercial lending is small relative to shinkin / shinkumi.
Geographic constraint. Each regional rokin covers one or more prefectures together as one block (no overlap between the 13 rokin).
Why joint MHLW supervision. The labour-union member structure and the workplace / consumer-protection scope make MHLW a natural co-supervisor alongside the FSA.

Central-institution comparison (the apex layer)

Field	Norinchukin (JA + JF)	Shinkin Central	National Federation of Credit Cooperatives (Zenshinkumiren)	Rokin Renraku
Statute	Norinchukin Bank Act	Shinkin Bank Act	Act on Cooperatives of SMEs + Kyokin Act	Labour Bank Act
Legal form	特殊法人	協同組織 (member-owned)	協同組織	協同組織
Founded	1923 (current law 1986)	1950 (改組 2000)	Mid-1950s (post-cooperative law)	1955
Members	系統団体出資 (JA Group + JF Group + forestry)	254 shinkin	143 shinkumi	13 rokin
Total assets class	~¥83tn (FY2024)	~¥48tn (2025-03)	Smaller; not publicly broken out at this granularity	¥6.2tn 資金量 (2025-03)
BoJ counterparty	Direct	Direct	Direct	Direct
Overseas branches	NY / London / Singapore	NY / London	None at this scale	None
Major investment role	Global fixed income / structured credit (high-profile losses 2008, 2024)	Domestic + foreign bonds / equities / alternatives	Smaller; system-support focus	System support + member-finance support; smaller investment book
Industry-body sibling	JA Zenchu (National Central Union of Agricultural Cooperatives) / Jf Zengyoren	Zenshin Kyo	全信中協	全国労働金庫協会

Deposit-insurance pathway comparison

Pathway	Institution covered	Statute	Coverage
DICJ	Shinkin, shinkumi, rokin, ordinary banks, trust banks, net banks, Japan Post Bank	Deposit Insurance Act	¥10m principal + interest; 決済用預金 fully protected
農水産業協同組合貯金保険機構 (separate parallel system)	Local JA, JA Shinnoren, local JF, JF Shingyoren, Norinchukin	農水産業協同組合貯金保険法	¥10m + interest (parallel design, separate fund)
Home-country regime	Foreign-bank branches (Banking Act Chapter IX)	Not DICJ; not the JA/JF system	Depositors rely on home-country protection; differs by bank

The dual-pathway design exists because the agricultural / fisheries cooperative system uses 貯金 (cooperative-statute terminology) rather than 預金 (Banking Act terminology), and the historical institutional design kept the cooperative-side insurance system separate from the bank-side DICJ. The protection economics are equivalent (¥10m + interest) but the legal mechanism, the fund, and the supervising authority are distinct.

System-level AUM and consolidation pattern

System	Central-institution AUM (approx)	Sector deposits (approx)	Consolidation trajectory
JA Bank	Norinchukin ~¥83tn (FY2024)	System-wide 貯金 ~¥107tn (2025-03)	Local JA: > 1,000 → 497 (continuous merger)
JF Marine Bank	Shared with JA via Norinchukin	System-wide 貯金 considerably smaller than JA	Local JF: hundreds → 71 (continuous merger)
信用金庫	Shinkin Central ~¥48tn (2025-03)	~¥161tn (2024-03, 254 shinkin)	254 (down from ~400+ over 25 years)
信用組合	全信組連 — smaller scale, not publicly broken out at this granularity	~¥24tn (2025-03)	143 (continuous cooperative-merger pattern)
労働金庫	Rokin Renraku 資金量 ¥6.2tn (2025-03)	~¥23tn (FY2024)	13 stable since the 1998-2003 regional consolidation

The two largest by both central-institution AUM and sector deposits are JA Bank (Norinchukin + JA 貯金) and shinkin (Shinkin Central + sector deposits). The remaining three are materially smaller as system aggregates.

How to read this matrix

Start with the statute row — if the question is about a cooperative-finance entity, that determines almost every other field.
Read the supervisor row next — FSA-only (shinkin), FSA + prefecture (shinkumi), joint FSA + MHLW (rokin), joint FSA + MAFF (JA / JF) — that determines which inspection / guideline regime applies.
Check the deposit-terminology row. 貯金 implies JA / JF (cooperative statute), 預金 implies shinkin / shinkumi / rokin (Banking Act parallel).
Check the deposit-insurance pathway. JA / JF use the 農水産業 cooperative pathway; shinkin / shinkumi / rokin use DICJ.
Check the central institution. Each system clears, settles, and accesses the BoJ through its own central — never directly through the member cooperative.
Check the non-credit federation siblings. JA in particular has an unusually large non-bank federation surface (JA Zenchu (National Central Union of Agricultural Cooperatives), Ja Zen Noh, Ja Kyosairen) that should not be flattened into “JA Bank”.

Supervisor-mix reading

System	FSA role	Co-supervisor	Cooperative-charter authority	Inspection cycle
JA Bank	Primary inspection of credit business	MAFF (cooperative-policy + agricultural-charter side)	MAFF + prefecture for cooperative-society aspects	FSA cooperative-finance inspection programme; MAFF involved on cooperative-charter aspects
JF Marine Bank	Primary inspection of credit business	MAFF (fisheries-policy + fisheries-charter side)	MAFF + prefecture for cooperative-society aspects	Parallel to the JA Bank supervision regime
信用金庫	Primary inspection (Local Finance Bureau)	None outside the FSA cooperative-finance line	FSA	Standard cooperative-finance inspection cycle
信用組合	Primary inspection (Local Finance Bureau)	Prefecture (prefectural authority for the cooperative-charter and member-eligibility)	FSA + prefecture	Joint supervision split
労働金庫	Primary inspection	MHLW (workplace / labour-union side)	MHLW	FSA inspection programme overlaid with MHLW workplace / consumer-protection supervision

The supervisor-mix row determines which ministry guideline updates flow into each system. A change in the FSA’s SME / regional financial-institution supervision guideline affects all five at the banking-supervision layer; a change in MAFF cooperative-policy affects JA / JF but not shinkin / shinkumi / rokin; a change in MHLW labour-policy can affect rokin specifically.

Holding-company route — why none of the five cooperative systems use one

None of the five cooperative-finance systems use the bank holding company route that is widely available under the Banking Act to ordinary / regional / second-regional banks. The reasons are structural:

The Banking Act holding-company framework applies to Banking-Act-licensed banks (普通銀行). The five cooperative-banking statutes (Shinkin Bank Act, Act on Cooperatives of SMEs + Kyokin Act, Labour Bank Act, Norinchukin Bank Act, Agricultural Cooperatives Act, Fishery Cooperatives Act) do not contain an equivalent holding-company permit framework.
Cooperative-finance institutions are member-owned (出資金 / 協同組織), not shareholder-owned. A standard holding-company structure assumes joint-stock parents.
The central-institution model (federation-anchored) already provides the consolidation, liquidity-pool, and system-strategy functions that a bank holding company would provide for a multi-bank group.

This means cooperative-system consolidation has to happen inside each system, through cooperative-to-cooperative mergers (e.g. shinkin-to-shinkin under Shinkin Bank Act procedures, JA-to-JA under the Agricultural Cooperatives Act), federation reorganisation (e.g. JA Shinnoren count reduction), or central-institution restructuring. Cross-system mergers (e.g. shinkin → regional bank, or shinkin → shinkumi) require a license-tier change, not a holding-company manoeuvre.

The licence-tier matrix Japan banking-license tier comparison matrix flags this explicitly: the “Holding company” row shows “No” for all cooperative tiers (shinkin, shinkumi, rokin, JA / JF / 農中). For comparison, regional banks and second-regional banks have used the holding-company route extensively — see Japan regional bank M&A consolidation family-tree matrix.

Cross-system overlap and non-overlap

Question	Answer	Notes
Do JA and JF share members?	Some overlap at the individual household level (a household can be both farmer + fisher) but the cooperative entities are distinct	Local JA ≠ local JF; the credit-business charter is separate
Do shinkin and shinkumi compete?	Yes, but the franchises are structured around different member-eligibility tests	Shinkin has a wider 営業地区 with the 50% non-member cap; shinkumi has a tighter (often industry / occupational) member rule
Do rokin compete with shinkin / shinkumi?	Limited — rokin members are organized through labour unions / consumer cooperatives, which is a different channel	Rokin’s lending mix (mortgage / education / consumer / life-event) overlaps with shinkin / shinkumi household-finance, but the customer-acquisition route differs
Do regional banks compete with cooperative-finance?	Yes — regional and second-regional banks have overlapping SME / household-finance markets in their prefectures	Regional banks operate under the Banking Act + the standard holding-company framework, but the franchise overlaps. See regional-bank-consolidation-pattern
Do megabanks compete with cooperative-finance?	Limited — megabanks are corporate / institutional / urban-consumer focused	Cooperative-finance institutions are member / regional / local-SME focused
Are foreign-bank branches in the cooperative lane?	No — foreign branches are entirely outside the cooperative-banking statutes	See foreign-bank-japan-retreat and japan-foreign-bank-retreat-refocus-timeline-matrix

Recent cooperative-finance reform — the 2021 Banking-Act-era expansion

The 2021 Banking Act 改正 envelope expanded the scope of bank-affiliated business (digital subsidiaries, regional-revitalization investment, consulting subsidiaries). The cooperative-finance statutes were updated in parallel under the same FSA reform direction:

Shinkin Bank Act amendments expanded affiliated-business scope.
Act on Cooperatives of SMEs + Kyokin Act amendments aligned cooperative-credit business with the broader cooperative-finance reform direction.
Labour Bank Act amendments included parallel affiliated-business-scope expansion.
Norinchukin Bank Act changes around capital structure / regulatory-capital flexibility.
Agricultural Cooperatives Act / Fishery Cooperatives Act changes followed the 2015 agricultural-cooperative reform direction (JA 全中 statutory role rolled back) and subsequent legislative work.

This 2021-era reform makes it somewhat easier for cooperative-finance institutions to invest in regional revitalization, consulting subsidiaries, and digital-finance subsidiaries — but does not open the bank-holding-company route, and does not change the deposit-insurance pathway split.

BoJ counterparty mechanics

System	BoJ counterparty	Settlement chain	Why federation-only
JA Bank	Norinchukin	Local JA → Shinnoren → Norinchukin → BoJ	Local JA / Shinnoren do not hold BoJ current accounts
JF Marine Bank	Norinchukin (shared with JA)	Local JF → JF Shingyoren → Norinchukin → BoJ	The same federation-only access pattern
信用金庫	Shinkin Central	Shinkin → Shinkin Central → BoJ	Individual shinkin clear through 信金中金
信用組合	National Federation of Credit Cooperatives (Zenshinkumiren)	Shinkumi → 全信組連 → BoJ	Individual shinkumi clear through 全信組連
労働金庫	Rokin Renraku	Rokin → 労金連 → BoJ	Individual rokin clear through 労金連

The federation-only BoJ counterparty pattern is the single most important operational consequence of the cooperative-finance statute design. It means that liquidity stress at any individual cooperative institution is intermediated through the federation, not through direct BoJ market operations. The four central institutions (Norinchukin, Shinkin Central, National Federation of Credit Cooperatives (Zenshinkumiren), Rokin Renraku) collectively are the operational entry points for the cooperative-finance lane into the BoJ payment / clearing infrastructure.

Boundary cases and caveats

JA Bank ≠ Norinchukin. Norinchukin is the central institution of the JA Bank system, but JA Bank as a system covers the local JA + Shinnoren layer as well. Treating Norinchukin as if it were the whole JA Bank system is the most common mistake.
JF Marine Bank shares Norinchukin but is a distinct system. The statute is the Fishery Cooperatives Act, not the Agricultural Cooperatives Act; the representative federation is Jf Zengyoren, not JA Zenchu (National Central Union of Agricultural Cooperatives). Treat it as a sibling system that happens to share the central institution.
Shinkin ≠ shinkumi. Both are 協同組織 cooperative-finance institutions, but the statute, central institution, supervisor mix, and member-eligibility rule are all different. Confusing them flattens the 254-shinkin and 143-shinkumi populations into one false category.
Rokin ≠ shinkin / shinkumi. Rokin has a distinct labour-union / consumer-cooperative membership structure, statute (Labour Bank Act), and joint MHLW supervision. The 13-rokin map is also structurally different from the 254-shinkin / 143-shinkumi long-tail populations.
JA non-credit federations are not banking entities. JA Zenchu (National Central Union of Agricultural Cooperatives) is a 一般社団法人 (representative / audit body), Ja Zen Noh is a commercial federation (fertilizer / feed / agricultural products), and Ja Kyosairen is a cooperative mutual-aid insurance federation. Only Norinchukin is the banking-side central institution. Do not list them in the deposit-taking universe.
Forestry cooperatives (JForest / 森林組合). Norinchukin is also the central institution for the forestry cooperative system (JForest), but JForest does not have a credit-business federation layer of meaningful scale comparable to JA / JF. JForest is a 4th cooperative leg of Norinchukin‘s 系統 mandate, not a 5th cooperative-finance lane on this matrix.
Industry bodies vs central institutions. Each system has both a member-banking-central institution (banking / treasury / investment / clearing) AND an industry body (representation / policy / training). For shinkin these are Shinkin Central vs Zenshin Kyo. For shinkumi these are National Federation of Credit Cooperatives (Zenshinkumiren) vs 全信中協. For rokin these are Rokin Renraku vs 全国労働金庫協会. Do not confuse the two.
Local JA / Shinnoren / Shingyoren counts move over time. The 497 / 31 / 71 / 10 layer counts cited above reflect 2025-04 Norinchukin disclosure; long-term consolidation continues to compress these numbers.
AUM figures. The system-aggregate AUM and 資金量 numbers in this matrix are public-domain summary anchors; for precise filings, consult the institution-specific disclosure pages and the 農中 / 信金中金 / 労金連ディスクロージャー誌.

Sources

FSA: 信用金庫免許一覧 (shinkin license registry).
FSA: 信用組合認可一覧 (credit cooperative authorization registry).
FSA: 労働金庫免許一覧 (rokin license registry).
FSA: 中小・地域金融機関向けの総合的な監督指針, Part V on 協同組織金融機関.
信用金庫法 / 中小企業等協同組合法 / 協同組合による金融事業に関する法律 / 労働金庫法 / 農業協同組合法 / 水産業協同組合法 / 農林中央金庫法 (Japanese Law Translation portal).
全国信用金庫協会: 信用金庫の制度.
Norinchukin official: 農林中央金庫の特徴 (JA Bank / JF Marine Bank layer counts as of 2025-04).
JA Bank: JAバンクのしくみ / JAバンクシステム.
JF Marine Bank: 基本方針 / システム概要.
Shinkin Central ディスクロージャー誌.
Rokin Renraku official profile (2025-03 disclosure).
JA Group Factbook (org.ja-group.jp).
DICJ: Deposit Insurance Corporation of Japan public site.
農水産業協同組合貯金保険機構 (parallel cooperative-finance insurance regime).
農林中央金庫決算のお知らせ (総資産 ~¥83兆, FY2024): https://www.nochubank.or.jp/ir/results/
JAバンク貯貸金動向 (JA 貯金残高 ~¥107兆, 2025-03末): https://www.jabank.org/about/jyokyo/
信金中金地域・中小企業研究所全国信用金庫主要勘定状況 (預金残高 ¥161.1兆, 2024-03末; 信金中金総資産 ~¥48兆, 2025-03): https://www.scbri.jp/reports/.assets/finance_20240502.pdf
全国信用組合中央協会信用組合業界概況 (預金積金 ¥23.9兆, 2025-03末): https://www.shinyokumiai.or.jp/credit_cooperative/outline.html
全国労働金庫協会数字で知るろうきん / 2024年度決算概況 (預金 ¥23.0兆, FY2024): https://all.rokin.or.jp/about/accounts.html