The Musashino Bank, Ltd. (武蔵野銀行)

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This entry sits under regional-banks INDEX. Read it against Fukuoka FG (FFG) for peer / contrast context and banking index for the broader system / regulatory boundary.

TL;DR

A standalone first-tier regional bank based in Saitama Prefecture (TSE PRIME 8336, head office in Omiya Ward, Saitama City). 1952-03-06 Established as a postwar newly-created regional bank to supplement SME finance in Saitama Prefecture after the war, listed on the TSE in 1973 . Nickname “Musashino”. Its in-prefecture competitor is Saitama Resona Bank (a subsidiary of resona-hd, share No.1). Through participation in the TSUBASA Alliance (a wide-area regional-bank coalition led by chiba-bank), it jointly handles IT, overseas, and market operations. A standalone bank structure that has not adopted a holding company continues.

1. Company profile

Legal name: The Musashino Bank, Ltd. English name: The Musashino Bank, Ltd. Securities code: TSE PRIME 8336 Established: 1952-03-06 (postwar newly-created regional bank) Head office: Sakuragicho, Omiya Ward, Saitama City, Saitama Prefecture 1-10-8 Nickname: Musashino Business type: First-tier regional bank (member of the Regional Banks Association of Japan) / standalone bank (has not adopted a holding company)

Timeline highlights

Year/Month	Event
1952-03-06	Musashino Bank established (to supplement SME finance within Saitama Prefecture after the war; postwar newly-created regional bank)
1973	Listed on the TSE
2003	Business alliance with Chiba Bank (prehistory of the later TSUBASA Alliance)
2015	Joined the TSUBASA Alliance (a wide-area regional-bank coalition led by chiba-bank)
2022-04	TSE market-segment review → transition to TSE PRIME
2024	Medium-term management plan launched

Group structure

Musashino Bank (standalone, TSE PRIME 8336)
  ├── Affiliated subsidiaries (leasing, cards, guarantee, consulting, etc.; in-prefecture business-support lines)
  └── TSUBASA Alliance (no equity stake; business alliance)
        ├── Chiba Bank (lead) [[regional-banks/chiba-bank]]
        ├── The Daishi Hokuetsu Bank
        ├── The Chugoku Bank
        ├── The Iyo Bank
        ├── The Toho Bank
        ├── The Hokuyo Bank
        ├── Musashino Bank ★
        ├── The Shiga Bank
        ├── The Bank of the Ryukyus
        └── others

2. Business segment map

Segment	Main business	Characteristics
Corporate finance	Lending and solutions for in-prefecture SMEs	The very purpose of its founding; the mainstay

Geographic characteristics — the Saitama Prefecture market

Characteristics as a market:

Stable and thick demand for personal loans (mortgages)
A transaction base of small and medium manufacturers (auto parts, machinery, food)
Deposit and asset-management needs of the Tokyo-commuter segment
In-prefecture GDP, with the ordinance-designated city alone (Saitama City) plus the prefecture as a whole, forms a market on par with a major regional bank

In-prefecture competitive structure ★

Competitor	Parent	In-prefecture position
Megabanks 3 行	-	Branches in metropolitan areas such as Saitama City

Participation in the TSUBASA Alliance (from 2015)

The TSUBASA Alliance is a wide-area regional-bank coalition led by chiba-bank, and Musashino Bank joined in 2015 年. As prehistory, a business alliance with Chiba Bank had existed since 2003 年.

Main areas of cooperation:

Core-system sharing (TSUBASA core system)
Overseas-expansion support network
Market operations / risk management sophistication
Joint development of digital services (apps, APIs, etc.)
Personnel exchange / training

Has not adopted a holding company

Megabanks and fukuoka-fg concordia-fg hokuhoku-fg adopt holding-company structures, but Musashino Bank continues its standalone bank structure.

4. Regulation / policy

Supervisor: Financial Services Agency (FSA) / Kanto Local Finance Bureau
Membership: Regional Banks Association of Japan / Deposit Insurance Corporation
Applicable regulation: Banking Act, Financial Instruments and Exchange Act, and other standard regional-bank regulation
- 2024~ BOJ policy-rate normalization → bonus to regional-bank interest margins (positive factor)
- 2025~ regional-bank consolidation pressure (Antimonopoly Act special-exception law; curbing mutual collapse of regional banks)
- 2025~ strengthened sustainability disclosure / climate-related risk disclosure
- In-prefecture demographics (aging, outflow to Tokyo) → impact on medium- and long-term deposit volume

chiba-bank · resona-hd · gunma-bank · concordia-fg
fukuoka-fg · hokuhoku-fg
mufg · smfg · mizuho-fg

Sources

Wikipedia: The Musashino Bank, Ltd. (https://ja.wikipedia.org/wiki/武蔵野銀行, extracted 2026-05-19)
Musashino Bank official corporate site (timeline / company profile public information)
TSUBASA Alliance official site (member-bank composition and joint-business areas, public information)

[!info] Verification status confidence: likely (based on v1.0 public information 2026-05-19). The year of establishment, year of listing, TSUBASA participation, and in-prefecture competitive structure have been cross-checked against Wikipedia + official IR. In-prefecture share, branch-network details, and the latest financial figures should be checked against the most recent financial summary (kessan tanshin) and securities report.