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本页目录
TL;DR
The Japanese 共済 (kyosai / “cooperative mutual aid”) sector is a parallel insurance industry of cooperative-form underwriters operating outside the FSA-supervised Insurance Business Act perimeter. The four largest sub-sectors are JA共济 / 全共连（Zenkyoren）概览 — the agricultural cooperative federation, Zenrosai — the labour-cooperative federation, Japan kyosai vs FSA insurance perimeter matrix — the prefectural consumer-cooperative system, and Japan kyosai vs FSA insurance perimeter matrix — the consumer-cooperative system run by the consumer cooperative federation, each supervised by a different ministry (MAFF for JA, MHLW for Zenrosai and COOP, the prefectural governor for Kenmin) under cooperative-sector laws rather than the FSA Insurance Business Act. Smaller cooperatives such as 全自共 (全国自動車共済協同組合連合会 / national auto-cooperative federation) sit alongside. Aggregate sector reserves and in-force kyosai premium are on the order of mid-double-digit trillions of yen — large enough that any Japan-wide insurance-sector study that omits the cooperative perimeter materially understates protection-product scale. Kyosai products are functionally equivalent to FSA insurance (life-equivalent, non-life-equivalent, medical / cancer-equivalent) but legally, regulatorily, tax-wise, and conduct-wise separate. The cooperative sector is the structural counterpart that explains why the FSA-licensed life big-four and non-life big-three do not aggregate to “the Japan insurance market” on their own.
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This page sits under insurance INDEX and is the sector-level companion to the JA Kyosai / Zenkyoren overview (the largest individual kyosai underwriter). Read it together with the FSA life big-four and the FSA non-life big-three to see the formal perimeter, the mutual vs stock comparison for the corporate-form axis (kyosai sit at the cooperative end of the mutuality axis, further than FSA mutuals), the earthquake insurance public-private scheme for the asymmetry between FSA earthquake cover and kyosai earthquake cover (different reinsurance pools), economic-value-based solvency for the FSA capital rule that does not formally apply to the cooperative sector, and the global solvency framework comparison matrix for the cross-regime view. Entity anchors include JA 共济连（全国共济农业协同组合连合会 / National Mutual Insurance Federation of Agricultural Cooperatives） and (where present) the labour / consumer cooperative federation pages.
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共済 (kyosai) translates loosely as “cooperative mutual aid”. The legal structure is:
- Cooperative entity (協同組合 / kyōdō kumiai) — chartered under a cooperative-sector law (Agricultural Cooperatives Act for JA, Consumer Livelihood Cooperative Society Act for Zenrosai / COOP / Kenmin, Small and Medium-sized Enterprise Cooperatives Act for SME cooperatives).
- Membership-based — kyosai products are offered to members of the cooperative (and, within statutory limits, to non-member users).
- Cooperative-form underwriting — the cooperative federation underwrites the kyosai and holds the reserves; the unit-cooperative level handles sales and member relations.
- Cooperative-sector supervisor — the ministry with jurisdiction over the cooperative law in question, not the FSA.
Kyosai are functionally equivalent to insurance (premium paid, mortality / morbidity / loss-event benefits paid, reserves held against future claims) but are legally not 保険 (hoken / insurance) for purposes of the Insurance Business Act. This dual character is the source of most of the confusion about how the sector fits into the Japan insurance landscape.
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JA共済 (Zenkyoren)
The agricultural cooperative federation. Supervised by MAFF under the Agricultural Cooperatives Act. Full life-equivalent + non-life-equivalent product line including 終身共済 (whole-life-equivalent), 養老生命共済 (endowment-equivalent), 医療共済 (medical), 自動車共済 (auto), 建物更生共済 (building rehabilitation / fire-earthquake-savings hybrid). Asset / reserve scale comparable to the largest life big-four mutual; the single largest cooperative-sector entity. See the dedicated overview page.
全労済 / こくみん共済 coop (Zenrosai)
全国労働者共済生活協同組合連合会 / Zenrosai (formal: 全国労働者共済生活協同組合連合会; rebranded retail: こくみん共済 coop). The labour-cooperative federation, supervised by MHLW under the Consumer Livelihood Cooperative Society Act (消費生活協同組合法 / 生協法). Products span life-equivalent, medical, fire / dwelling, and auto cooperatives. The retail-facing brand “こくみん共済 coop” emphasises a low-cost, plain-language alternative to commercial insurance for working-household members. Distribution is via the labour cooperative federation channels.
県民共済 (Kenmin Kyosai)
A prefectural-cooperative system under prefectural-governor supervision (also via MHLW where the cooperative law applies) under the consumer-cooperative framework. Products are typically simple, low-cost, age-banded life-equivalent, medical-equivalent, and family-package kyosai with annual surplus return (“割戻金”) to members. The model is membership in a prefectural consumer cooperative that operates the kyosai. The aggregate footprint is large in number of members, especially in Tokyo, Saitama, Chiba, Kanagawa, and other Kanto-area prefectures.
COOP共済 (CO・OP共済)
Run by the Japan kyosai vs FSA insurance perimeter matrix cooperative system. Supervised by MHLW under the Consumer Livelihood Cooperative Society Act. Products include life-equivalent, medical-equivalent, and family-package kyosai distributed to consumer-cooperative members. Distribution leverages the COOP grocery / consumer cooperative member base.
Other notable kyosai
- 全自共 (全国自動車共済協同組合連合会) — auto cooperative federation; specialist auto kyosai under the Small and Medium-sized Enterprise Cooperatives Act.
- 教職員共済 (教職員共済生活協同組合) — teaching staff cooperative kyosai.
- 公務員共済 / 警察共済 — public-sector mutual aid that includes some insurance-like benefits; these are functionally part of the public mutual-aid pension and health system but are sometimes grouped under “kyosai” loosely.
- 商工中金共済 / 中小企業共済 — SME cooperative kyosai under METI-related cooperative laws.
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| Axis | FSA insurance (Insurance Business Act) | Kyosai (cooperative-sector laws) |
|---|---|---|
| Supervisor | FSA | MAFF / MHLW / prefectural governor / METI depending on cooperative law |
| Governing law | 保険業法 (Insurance Business Act) | 農業協同組合法 / 消費生活協同組合法 / 中小企業等協同組合法 |
| Corporate form | Mutual or stock insurance company | Cooperative federation / federation of unit-cooperatives |
| Owner | Policyholders (mutual) or shareholders (stock) | Member cooperatives / individual cooperative members |
| Solicitation rule | Insurance Business Act 募集 rule + FSA agency / broker registration | Cooperative-law solicitation rule within member relationship |
| Eligibility | Open to any individual or entity | Members (and limited non-member users) of the cooperative |
| Product name | 保険 (hoken / “insurance”) | 共済 (kyosai / “mutual aid”) |
| Capital rule | FSA solvency margin / FSA economic-value ESR | Cooperative-law solvency margin (MAFF for JA, MHLW for Zenrosai / COOP / Kenmin) |
| Reinsurance | Open external reinsurance market; JER pool for compulsory earthquake | Cooperative-sector reinsurance / co-kyosai arrangements; separate from JER |
| Tax treatment | Insurance-sector tax | Cooperative-sector tax (different premium-deduction and benefit-tax rules) |
| Policyholder protection | FSA-administered protection corporations (life / non-life) | Cooperative-sector arrangements; outside FSA protection corporations |
| Disclosure | FSA-format disclosure | Cooperative-law disclosure (annual disclosure document) |
A kyosai whole-life-equivalent and an FSA whole-life are economically very similar products. The differences are wholly on the legal / regulatory / tax / conduct side. This is why analytical work should specify which perimeter is in scope and not assume the FSA perimeter equals “Japan insurance”.
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Aggregating the cooperative sector to a clean total is difficult because of supervisor split, different reporting calendars, and different reserve-definition conventions. Approximate scale markers (conceptual, not as-of-date):
- JA共済 (Zenkyoren) — general-account assets in the tens of trillions of yen, comparable to the largest life big-four mutual. Largest single cooperative-sector entity.
- 全労済 / こくみん共済 coop — multi-trillion-yen reserve and asset scale.
- 県民共済 — large member base, smaller per-member reserves given lower-premium / annual-surplus-return product design.
- COOP共済 — large member base via consumer-cooperative membership.
Aggregate kyosai-sector reserves and in-force premium are on the order of mid-double-digit trillions of yen by reserve scale — large enough to be a structural part of the Japanese household protection market. Comparing FSA-perimeter and kyosai-perimeter reserves requires that the reserve definition be aligned across the cooperative-sector and FSA-sector reporting frameworks.
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Kyosai are treated differently from insurance for personal income tax purposes:
- Premium-deduction (生命保険料控除 / 個人年金保険料控除 etc.) — kyosai premiums are eligible for the same individual-income-tax life-insurance premium deduction in most cases, but the exact eligible product set and ceiling vary.
- Benefit taxation — death benefits and surrender values are taxed under broadly similar rules to insurance benefits, with cooperative-sector-specific provisions for some product lines.
- Cooperative-sector tax — at the underwriter level, cooperative federations are taxed under cooperative-sector tax rules rather than insurance-sector tax rules.
The premium-deduction parity is the main practical reason a household can choose between an FSA insurance policy and a kyosai equivalent without losing the income-tax deduction; the choice is then driven by product design, membership fit, and channel preference rather than by tax outcome.
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The kyosai / insurance split has consequences for how Japan-wide insurance work should be framed:
- Industry-aggregation papers must specify perimeter. A “Japan life insurance market” total that uses FSA-only data is materially smaller than the household-protection economic total. A “Japan total protection” total that adds kyosai requires careful definitions.
- Capital-rule comparison is not unified. FSA ESR (economic-value, from April 2025) is the headline private-insurer capital rule; MAFF and MHLW kyosai capital rules are technically separate. Zenkyoren and others mirror the FSA framework voluntarily but it is not legally the same regime.
- Reinsurance-pool architecture is asymmetric. The compulsory earthquake-cession pool (JER) covers FSA non-life insurers; kyosai earthquake cover sits in a different architecture. See earthquake insurance public-private scheme.
- Distribution-regulation architecture is asymmetric. Insurance Business Act solicitation rules (including the insurance agency and brokerage Japan registration / conduct framework) do not formally apply to kyosai; cooperative-sector solicitation rules apply.
- Policyholder-protection architecture is asymmetric. FSA protection corporations cover FSA-licensed insurers’ policyholders; cooperative-sector protection arrangements cover kyosai members. A failed kyosai member does not have access to the FSA protection corporation.
- Foreign-affiliate competitive set comparison. Foreign-life affiliates compete in the FSA-insurance perimeter, not in the kyosai perimeter; comparing market-share across the two perimeters confuses the picture.
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Use this page when:
- Sizing the Japan household protection / insurance market with both perimeters in mind.
- Reading a kyosai-sector disclosure document and needing the broader sector context.
- Comparing a JA共済 product against an FSA equivalent on price, channel, and structural basis.
- Tracking which regulator a particular kyosai entity reports to.
- Analysing the structural separation between FSA insurance reinsurance pools (e.g., JER earthquake) and kyosai-sector pools.
- Researching the “second-tier” of large protection underwriters in Japan that are not on standard FSA-perimeter peer lists.
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- “Mutual aid” can include public-sector schemes. Public-employee mutual aid (公務員共済), teacher mutual aid (教職員共済), and similar are not always the same legal category as cooperative-law kyosai; specify when in scope.
- Aggregate scale is approximate. Treat sector-totals as conceptual; pull current MAFF / MHLW / federation disclosure for exact figures.
- Premium-deduction eligibility varies. Confirm product-specific tax eligibility for any planning use; the page does not give individual tax advice.
- Cross-perimeter reserve comparison. FSA-format and cooperative-format reserve definitions are not always identical; cross-perimeter sum requires care.
- Solvency-framework convergence is voluntary. Zenkyoren and some other federations voluntarily mirror the FSA economic-value framework; the binding rule remains the cooperative-sector capital rule.
- No kyosai is FSA-licensed. Some adjacent entities (specialized small-amount short-term insurance / 少額短期保険 firms) are FSA-licensed but structurally small and not part of the cooperative sector.
- Cooperative-sector earthquake cover. Kyosai earthquake cover (e.g., JA tate-kō, kenmin kyosai earthquake riders) is structurally separate from the FSA earthquake-insurance JER pool. See earthquake insurance public-private scheme.
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- INDEX
- ja-kyosai-zenkyoren-overview
- japan-life-insurance-big-four
- japan-nonlife-big-three
- mutual-vs-stock-life-insurer
- earthquake-insurance-public-private-scheme
- economic-value-based-solvency
- esr-economic-value-solvency
- global-solvency-framework-comparison-matrix
- insurance-agency-and-brokerage-japan
- foreign-life-affiliate-japan-positioning
- ja-kyosairen
- insurance-license-and-solvency
- fsa
- MAFF (Ministry of Agriculture, Forestry and Fisheries)
- MHLW (Ministry of Health, Labour and Welfare)
- FinWiki index
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- JA共済連 (Zenkyoren): annual disclosure document.
- こくみん共済 coop / 全労済 (Zenrosai): corporate site and disclosure.
- 全国生協連 / 県民共済: cooperative-sector disclosure.
- 日本生協連 / CO・OP共済: cooperative-sector disclosure.
- MAFF: 共済事業 / 農業協同組合 supervision.
- MHLW: 消費生活協同組合 supervision.
- FSA: economic-value-based solvency hub (cross-reference).
- Consumer Livelihood Cooperative Society Act (生協法), Agricultural Cooperatives Act, SME Cooperatives Act.