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Custodiem, Inc. — Japanese crypto-asset exchange service provider overview

Confidence: Likely Updated 2026-05-18 Review by 2026-08-08 Sources 4 Machine-translated Original (JA)
#fintech#jp-crypto-exchange#vasp
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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

On the official site, the current lineup of supported assets is not disclosed (since the end of 2024年, the migration of existing accounts to bitFlyer has been prioritized). In the predecessor FTX Japan era, it handled major currencies including BTC and ETH. A detailed current asset list is not disclosed.

4. Scope of business

  • Crypto custody (crypto-asset deposit): newly developed as the core business from 2024年 onward
  • Crypto-asset exchange business: spot trading (service continuing for existing customers)
  • Derivatives trading: supported by the financial-instruments-business license (operating status not disclosed)
  • Future business (planned): crypto-asset spot-ETF-related services after the development of Japanese domestic legislation
  • Account migration: promoting migration to bitFlyer on a customer-consent basis
  • Information-leak response: 2026年4月, disclosing and responding to a possible customer-information leak due to a cloud-environment misconfiguration

5. Market share / trading volume

  • Both trading volume and account count are not disclosed
  • Since 2024年, it has prioritized the return of existing customers’ assets and migration to bitFlyer, and new-customer acquisition is halted
  • Industry position: historically the 2th registered operator holding license number 第00002号, but its current business scale is in a retail-service-contraction phase

6. History / major events

Year/monthReason
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年7月Disclosed that FTX Japan became a wholly-owned subsidiary of bitFlyer Holdings, Inc. (share-transfer agreement concluded)
2024年8月26日Trade name changed to “Custodiem, Inc.” (corporate number 7010401115356 unchanged)
2024年9月13日Head-office relocation (Chiyoda-ku → Midtown Tower 37F, Akasaka, Minato-ku)
2026年4月Disclosed and apologized for a possible customer-information leak due to a cloud-environment misconfiguration

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.

  • 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)

Sources