Custodiem, Inc. — Japanese crypto-asset exchange service provider overview
ConfidenceLikelyUpdated2026-07-29Review by2027-01-29Sources6Machine-translatedOriginal (JA)
On this page
Wiki route
This entry sits under exchanges index. Read it with FSA crypto-asset exchange registration system — number system / Local Finance Bureau jurisdiction / registration requirements for adjacent context and Japan Financial Regulation — Legal Framework for Tokens, Crypto Assets, and Payments for the broader system boundary.
FSA registration number Kanto Local Finance Bureau 第00002号 · JVCEA member #1003 · registration date 2017-09-29
1. Corporate / shareholders
- Trade name: Custodiem, Inc. (株式会社 Custodiem)
- Corporate number: 7010401115356 (confirmed on the National Tax Agency corporate-number publication site)
- Establishment date: 2014年11月25日 (established as QUOINE Co., Ltd.)
- Head-office location: Midtown Tower 37F, 9-7-1 Akasaka, Minato-ku, Tokyo
- Parent: bitFlyer Holdings, Inc. (acquisition completed 2024年)
- Representative Director: Hiroshi Nagoro
2. License / registration status
- Crypto-asset exchange business: Director-General of Kanto Local Finance Bureau 第00002号 (registered 2017-09-29)
- Financial instruments business (Type I): Director-General of Kanto Local Finance Bureau (FIB) 第3297号
- JVCEA member: Type I member (member number 1003) · crypto-asset exchange business + crypto-asset derivatives business
3. Supported currencies
Current service-site notices and trading rules take precedence for supported assets. The company states that operations related to running an exchange are suspended, while notices cover withdrawals and continued handling of certain assets; therefore, a historical fixed list should not be presented as the set of assets currently available for trading.
4. Scope of business
- Crypto custody / spot-ETF-related business: the 2024 name-change notice described these as core businesses to be considered and prepared for, conditional on development of the legal framework
- Crypto-asset exchange and Type I financial instruments businesses: the licenses are maintained. The official site says operations related to running an exchange are suspended, while withdrawal services continue
- Information-leak response: the company disclosed that it identified a possible customer-information leak caused by a cloud misconfiguration on July 31, 2025, and received an FSA reporting order on August 21, 2025
5. Market share / trading volume
- Among the Custodiem, FSA, and JVCEA materials identified in this review as of 2026-07-29, no current trading-volume or account-count disclosure was identified. This does not establish that no such disclosure exists
- Current official notices focus on withdrawals, and state that operations related to running an exchange are suspended. The low registration number should not be treated as evidence of current business scale or market rank
6. History / major events
The table below is limited to corporate continuity, registration, acquisition, name change, and material events confirmed through Custodiem/former FTX Japan notices, bitFlyer Holdings’ acquisition disclosure, the National Tax Agency corporate-number record, and FSA/JVCEA materials.^[Sources: https://www.custodiem.com/; https://support.custodiem.com/hc/ja/articles/29710664413709-FTX-Japan-%E6%A0%AA%E5%BC%8F%E4%BC%9A%E7%A4%BE%E3%81%AE%E5%95%86%E5%8F%B7%E5%A4%89%E6%9B%B4%E3%81%AB%E9%96%A2%E3%81%99%E3%82%8B%E3%81%8A%E7%9F%A5%E3%82%89%E3%81%9B; https://www.houjin-bangou.nta.go.jp/henkorireki-johoto.html?selHouzinNo=7010401115356; https://jvcea.or.jp/member/.]
| Year/month | Reason |
|---|---|
| 2014年11月 | QUOINE Co., Ltd. established (Tokyo-based from establishment) |
| 2014年 | Launched Quoinex (coin exchange), where crypto-assets can be purchased with fiat currency |
| 2015年 | Added margin trading; began offering a mobile app |
| 2016年 | Raised 2,000万 USD from VCs |
| 2017年 | Registered with the FSA as a crypto-asset exchange service provider (Kanto Local Finance Bureau 第00002号); launched Qryptos |
| 2018年 | Launched the Liquid platform integrating Quoinex + Qryptos |
| 2020年4月 | Head-office-location change (Kyobashi, Chuo-ku → Chiyoda-ku) |
| 2022年4月 | Acquisition of the former Liquid company (FTX Japan Holdings) and QUOINE by FTX Trading → trade name changed to “FTX Japan Co., Ltd.” (the corporate number continued unchanged) |
| 2022年11月 | FTX Trading collapse (FTX Japan continued operations under the protection of Japanese law, with assets segregated) |
| 2023年 | Began and carried out asset-return services to customers |
| 2024-07-26 | bitFlyer Holdings, Inc. completed its acquisition of all shares in FTX Japan, making it a wholly owned subsidiary |
| 2024-08-28 | Trade name changed to “Custodiem, Inc.” (corporate number 7010401115356 unchanged) |
| 2024-09-13 | Head-office relocation (Chiyoda-ku → Midtown Tower 37F, Akasaka, Minato-ku) |
| 2025-07-31 | Identified a possible leak of some customer information caused by a cloud-environment misconfiguration |
| 2025-08-21 | Received an FSA reporting order concerning the possible information leak |
Confirmation of corporate continuity: via the National Tax Agency corporate-number publication site, it is confirmed from a primary source that QUOINE Co., Ltd. → FTX Japan Co., Ltd. → Custodiem, Inc. are the same corporate number 7010401115356 . The FSA 第00002号 (originally registered under the QUOINE name) was also succeeded as-is.
7. Strategic trends
- Core-business transition policy: the 2024 official notice described crypto custody and spot-ETF-related services following development of the legal framework as businesses under consideration and preparation. It should not be read as confirmation that either service has launched
- Role division within the bitFlyer group: bitFlyer = sales outlet / exchange, Custodiem = custody + future ETF-related services (for the background of customer-asset return from FTX Japan, see FTX Japan customer-asset 100% return case — the world's first immediate full-return case)
- Crypto-asset spot-ETF preparation: plans to offer spot-ETF-related services, conditional on the development of Japan’s domestic legal system (the timing of legislative development is uncertain; for market impact, see Impact of US approval of Bitcoin spot ETFs on domestic CEXs (2024-01~) and Japan Institutional Custody Three-Pillar Structure — Komainu / Ginco / Fireblocks Japan Comparison)
- Capital-adequacy ratio: disclosed as of 2026年3月31日 (for detailed figures, see the PDF)
8. Related people
- Representative Director: Hiroshi Nagoro (stated on the official site)
- Predecessor founder: Mario Gomez-Lozada (QUOINE co-founder and former CEO, public information)
- Acquirer: bitFlyer Holdings, Inc. (detailed officer composition not disclosed)
Related
- jp-exchange-bitflyer — the parent group under bitFlyer Holdings
- japan-financial-regulation — overall Japanese financial regulation
- japan-stablecoin-regulatory-landscape — related stablecoin regime
- jp-trust-type-sc-architecture — related SC regime
- ftx-japan-100pct-return-case-study — FTX Japan 100% return case study (predecessor)
- jp-institutional-custody-three-pillars — the three pillars of JP institutional custody
- btc-spot-etf-japan-impact — BTC spot ETF Japan impact (ETF preparation)
Sources
- Custodiem, Inc. official site (accessed 2026-05-18)
- JVCEA member list (accessed 2026-05-18)
- National Tax Agency corporate-number publication site — corporate number 7010401115356 (accessed 2026-05-18)
- FSA Crypto-Asset Exchange Service Provider Registration List (Excel) (snapshot 令和8年4月1日 = 2026-04-01)
- Custodiem — name change from FTX Japan (2024-08-28)
- Custodiem — possible information leak caused by a cloud misconfiguration (accessed 2026-07-29)
#fintech#jp-crypto-exchange#vasp
Discovery
Keep reading
Read next
- Digital Asset Markets, Inc. — Japan crypto-asset exchange operator overviewThe capital participation from Mitsui & Co. (2019年8月) and Japan Exchange Group (2022年2月) is particularly notable.
- DMM Bitcoin Inc. — Japanese crypto-asset exchange operator (former VASP) overviewThe 18 spot-trading assets supported as of 2023年 (major assets):
- 株式会社DMM.com証券 (DMM.com Securities) — Japan financial-instruments business operator (crypto-asset derivatives) overviewThe company's mainstay business comprises the following 4 pillars:
Links here
- FSA Business Improvement Order (BIO) domestic VASP administrative-action history (2018-2026)A Business Improvement Order (BIO) is, among the administrative actions the Financial Services Agency issues to supervised operators, a mid-level action ordering the submission and execution...
- FTX Japan customer-asset 100% return case — the world's first immediate full-return case2022-11-11, FTX Trading Ltd. and others filed for Chapter 11 . Globally, owing to the liquidity crisis with Alameda Research + the commingling of customer funds with proprietary use, FTX cus...
- Global crypto-asset prime brokerage layer — Hidden Road / FalconX / Galaxy / B2C2 / CumberlandCrypto-asset prime brokerage is a layer that provides institutional investors with (a) consolidated accounts (multi-CEX cross-margin), (b) custody, (c) lending, (d) execution, and (e) report...
- Japan CEX parent FG adjacency matrixA Japanese 暗号資産交換業者 (FSA-registered VASP) is rarely a standalone business — it is almost always a node inside a parent financial group (FG) that already runs securities, banking, payments, p...
- Japan VASP business-model competitive matrix — comparison of 39 社's business segments / revenue structures / differentiation axesThe FSA crypto-asset exchange service provider registry lists 26 operators as of 2026-06-30. The matrix's 39 analytical rows also include crypto-asset derivatives, electronic-payment-instrum...