SBI Regional Bank Holdings

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This entry sits under megabanks INDEX. Read it against Mitsubishi UFJ FG (MUFG) for peer / contrast context and banking index for the broader system / regulatory boundary.

TL;DR

A regional-bank-consolidation platform holding company under sbi-hd. As a corporation, it was established 2015-08-25 as “ER6 Co., Ltd.”, renamed “SBI Bank Holdings Co., Ltd.” 2019-07-05, and renamed to its current name “SBI Regional Bank Holdings Co., Ltd.” 2020-05-01, being repurposed as the execution vehicle for regional-bank consolidation (the bank-holding-company authorization is from 2022-10-07). It is the core corporation of the “4 th megabank concept” advocated by Yoshitaka Kitao in 2020 , overseeing capital and business alliances, management support, and system shared-use for SBI-affiliated regional banks (partner regional banks). It holds sbi-shinsei-bank (made a wholly owned subsidiary 2023-09 ) as its commercial-banking core, and has capital alliances with 10 行-plus mid-tier regional banks including Chikuho Bank, Shimizu Bank, Daito Bank, Fukushima Bank, Shimane Bank, and Dai-ichi Kangyo Credit Cooperative. It aims at a “loose-confederation model” that shares group resources such as SBI Securities, crypto-assets, and investment products across the regional-bank network.

1. Company overview

Legal name: SBI Regional Bank Holdings Co., Ltd. English name: SBI Regional Bank Holdings, Inc. Established: 2015-08-25 (established as “ER6 Co., Ltd.”) Name changes: 2019-07-05 “SBI Bank Holdings Co., Ltd.” → 2020-05-01 “SBI Regional Bank Holdings Co., Ltd.” Bank-holding-company authorization: 2022-10-07 (Financial Services Agency) Parent: sbi-hd (consolidated subsidiary, TSE PRIME 8473) Line of business: regional-bank-consolidation platform holding company (an overseeing company, not a banking business) Positioning: execution vehicle of the SBI HD “4 th megabank concept” (advocated 2020 ) Head office / capital: 1-6 -1 号 Roppongi, Minato-ku, Tokyo / capital 1 億円

Main components

SBI HD (TSE PRIME 8473, Yoshitaka Kitao Chairman & CEO)
  └── SBI Regional Bank Holdings (regional-bank-consolidation platform)
        ├── SBI Shinsei Bank (100%) ★ commercial-banking core ── [[regional-banks/sbi-shinsei-bank]]
        ├── partner regional banks under capital and business alliances (ownership ratios vary greatly by bank, from a few % to ~34%)
        │     ├── Chikuho Bank (Fukuoka)
        │     ├── Shimizu Bank (Shizuoka)
        │     ├── Daito Bank (Fukushima)
        │     ├── Fukushima Bank (Fukushima)
        │     ├── [[regional-banks/shimane-bank|島根銀行]] (Shimane)
        │     ├── Sendai Bank (under [[regional-banks/jimoto-hd]], Miyagi)
        │     ├── Tsukuba Bank (Ibaraki)
        │     ├── Towa Bank (Gunma)
        │     ├── Kirayaka Bank (under [[regional-banks/jimoto-hd]], Yamagata)
        │     └── Dai-ichi Kangyo Credit Cooperative (Tokyo), etc.
        └── common functions for regional banks (DX / investment products / crypto-assets / securities resources)

Strategic intent of 2020 consolidation-platformization

SBI HD had been advancing individual investments into regional banks from the latter half of the 2010 年s, but on the occasion of the “4 th megabank concept” advocated in 2020 , it renamed the dormantly held existing corporation (the “ER6 Co., Ltd.” established in 2015-08-25, renamed “SBI Bank Holdings” in 2019-07 ) to “SBI Regional Bank Holdings” in 2020-05-01 and turned it into a consolidation platform. It is a mechanism that complements, with SBI-side group resources, the system investment / investment-product development / digital finance for younger customers that regional banks find difficult on their own.

2. Main businesses

Function	Content
Overseeing partner regional banks	management support / director dispatch / strategic advice to 10 行-plus capital-and-business-alliance partners
Commercial-banking core	sbi-shinsei-bank (former Shinsei Bank, made a wholly owned subsidiary 2023-09 )
Regional-bank DX shared-use	commonization of system investment / cost sharing
Investment-product supply	deploying SBI Securities / SBI Asset Management products via regional-bank bancassurance
Crypto-assets / new domains	functions such as SBI VC Trade to regional-bank customers
Capital partner	investments into individual regional banks (Shimane Bank 20.9%, Fukushima Bank 34.2%, Jimoto HD 12.4%, etc. Shimizu Bank / Daiko Bank / Towa Bank / Chikuho Bank / Tohoku Bank, etc., are on a few-% scale)

Partner regional-bank network (main, in chronological order of investment)

Shimane Bank (invested 2019-09 , about 34%) ── a precedent case before the 4 th megabank concept
Fukushima Bank (invested 2019-11 )
Chikuho Bank (invested 2020-03 )
Shimizu Bank (business alliance 2020-09 )
Towa Bank (business alliance 2020-11 )
Jimoto Holdings jimoto-hd (2021, parent of Sendai Bank / Kirayaka Bank)
Daito Bank (2021, Fukushima)
Tsukuba Bank (2021, Ibaraki)
Dai-ichi Kangyo Credit Cooperative (2021, Tokyo)
Daiko Bank (2021, Niigata), etc.

Note: ownership ratios / alliance forms vary greatly by regional bank (Shimane Bank 20.9%, Fukushima Bank 34.2% are at the equity-method-application level; Shimizu Bank 2.5%, Towa Bank 1.0%, Chikuho Bank 2.9%, etc., are on a few-% scale). Because ratios / alliance forms vary by point in time, refer to SBI HD IR for the latest.

Pre-history of the concept (latter half of the 2010 年s)

Yoshitaka Kitao (SBI HD Chairman & CEO) recognized regional banks’ management difficulties / population decline / low profitability as an opportunity
2019-09 invested about 34% in Shimane Bank ── the 第 1 号 of regional-bank capital alliances
2019-11 invested in Fukushima Bank
2020-03 invested in Chikuho Bank

Advocacy of the “4 th megabank concept” and the name change to SBI Regional Bank HD

Year/month	Event
2015-08-25	corporation established (as “ER6 Co., Ltd.”)
2019-07-05	renamed to “SBI Bank Holdings Co., Ltd.”
2020	Yoshitaka Kitao announced the “4 th megabank concept”
2020-05-01	renamed to “SBI Regional Bank Holdings Co., Ltd.” (repurposed as a regional-bank-consolidation platform)
2021-2023	phased investments / business-alliance expansion into multiple regional banks
2022-10-07	the FSA authorized it as a bank holding company
2021-09	former Shinsei Bank TOB started (led by SBI HD)
2021-12	former Shinsei Bank TOB succeeded, SBI HD became the top shareholder
2023-09-25	former Shinsei Bank made a wholly owned subsidiary / delisted, renamed SBI Shinsei Bank → positioned as the commercial-banking core sbi-shinsei-bank
2024	SBI HD continued the policy of expanding the regional-bank consortium in its mid-term management plan

Significance of the former Shinsei Bank TOB

For the former Shinsei Bank, the handling of government-held shares (Deposit Insurance Corporation / Resolution and Collection Corporation held about 22%) was a long-standing pending issue
SBI HD acquired former Shinsei Bank shares from 2019 , and via the 2021-09 TOB → 2023-09 full subsidiarization, acquired a commercial-banking core under the regional-bank HD

”Loose confederation” model

Preserving management independence: the management of partner regional banks is left to each bank (mergers / consolidation are not forced)
Resource sharing: SBI Securities / crypto-assets / investment products / systems / personnel are made common infrastructure
No vertical integration needed: rather than 3 megabank-style full subsidiarization, it is a loose confederation of capital alliance + business cooperation
Economies of scale: jointly bearing DX investment that regional banks find difficult on their own

Competitive / opposing axes

Competitor	Positioning
ndfg	Eastern-Japan (Chiba Bank / Musashino Bank) confederation, TSUBASA Alliance (led by chiba-bank)
fukuoka-fg	Kyushu-based, a precedent case of regional-bank consolidation (former Shinwa Bank / Eighteenth Bank consolidation)
concordia-fg	a former-regional-bank-consolidation FG of Bank of Yokohama / Higashi-Nippon Bank
3 megabanks (mufg / smfg / mizuho-fg)	for large domestic corporations; the regional-bank domain is outside their competition
TSUBASA Alliance	a system-shared-use confederation of 10 行-plus banks such as Chiba Bank / Hokuyo Bank / Iyo Bank (a counter-confederation among regional banks)

Core functions and aims

Personal digital finance: SBI-affiliated infrastructure such as SBI Securities / Sumishin SBI Net Bank / SBI Insurance to regional-bank customers
Corporate: the corporate-lending / specialty-finance functions of the former Shinsei Bank to regional-bank corporate customers
Asset management: deploying SBI Asset products / crypto-assets (SBI VC Trade) via regional-bank bancassurance
DX: cost reduction for regional banks through core-system commonization / mobile-banking unification

Commercial-banking core = SBI Shinsei Bank

Utilizing the former Shinsei Bank like a “central bank of the regional-bank HD” sbi-shinsei-bank
Opening functions such as APLUS (credit cards) / Showa Leasing / Shinsei Financial (consumer finance) to the regional-bank network

5. Regulation / policy

Principal supervisor: Financial Services Agency (FSA) ── linked to regional-financial-institution reorganization policy
FSA regional-bank reorganization policy: consistent with the policy of promoting “regional-bank reorganization for regional-economy revitalization”
Public-funds issue: Of the public funds injected into the former Shinsei Bank (former Long-Term Credit Bank of Japan), an unrecovered portion of about 3500 億円 had been a long-standing pending issue (an amount widely referred to on a reporting basis). Repayment after the SBI HD subsidiarization had been a point of contention, but based on the 2025-06 agreed fixed-repayment scheme, it fully repaid the remaining amount of about 2300 億円 in 2025-07-31 (on an FSA / SBI HD published basis)

Sources

Wikipedia: SBI Holdings / 4 th megabank concept (accessed 2026-05-19)
SBI HD corporate site / integrated report (official IR)
securities reports / timely disclosures of each partner regional bank (on a capital-alliance-publication basis)
Wikipedia: SBI Regional Bank Holdings (ownership ratios: Shimane 20.9%, Fukushima 34.2%, Jimoto HD 12.4%, etc., 2026-05-29 confirmed): https://ja.wikipedia.org/wiki/SBI地銀ホールディングス
SBI HD news release: Notice of full repayment of public funds by SBI Shinsei Bank (2025-07-31): https://www.sbigroup.co.jp/news/2025/0731_15628.html

[!info] Verification status confidence: likely (v1.0 Wikipedia + official IR basis 2026-05-19, with 2026-05-29 ownership ratios / public funds corrected by primary / reporting sources). Ownership ratios of partner regional banks (Shimane 20.9%, Fukushima 34.2%, Jimoto HD 12.4%, Shimizu 2.5%, Daiko 2.8%, Tohoku 2.9%, Towa 1.0%, Chikuho 2.9%, etc.) are subject to point-in-time variation; refer to SBI HD IR for the latest values.