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Deloitte Touche Tohmatsu LLC (Deloitte Touche Tohmatsu)

Confidence: Likely Updated 2026-05-24 Review by 2026-11-20 Sources 7 Machine-translated Original (JA)
#JapanFG#audit#big4#assurance#accounting#deloitte
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This entry sits under financial-regulators INDEX. Read it alongside Ey Shinnihon and PwC Japan LLC (formerly PwC Arata) for peer Big 4 audit context, and Financial licenses for the regulatory boundary of the Certified Public Accountants Act / audit quality control. The CPAAOB supervisory context falls under the jurisdiction of FSA Supervision Bureau and Strategy Development and Management Bureau (FSA Strategy Development and Management Bureau).

1. Firm overview

  • Official name: Deloitte Touche Tohmatsu LLC
  • English name: Deloitte Touche Tohmatsu LLC
  • Legal form: limited-liability audit corporation
  • Headquarters: Marunouchi, Chiyoda-ku, Tokyo
  • Member network: Deloitte Touche Tohmatsu Limited (DTTL) (London head office)
  • Group entities:
    • Deloitte Tohmatsu Consulting LLC (strategy / consulting)
    • Deloitte Tohmatsu Financial Advisory LLC (FAS / M&A)
    • Deloitte Tohmatsu Tax Co. (tax)
    • Deloitte Tohmatsu Risk Advisory LLC (risk / cyber)

2. History

Year/MonthEvent
1968Tohmatsu Awoki & Co. established (the direct predecessor of Tohmatsu; “Tohmatsu” is short for Tomatsu-Aoki)
1975Touche Ross international affiliation
1989Touche Ross + Deloitte Haskins & Sells global merger → formation of Deloitte Touche Tohmatsu (a Japanese-affiliated presence in that “Tohmatsu” was incorporated into the firm name)
2008-07Conversion into a limited-liability audit corporation under the amendment of the Certified Public Accountants Act
2003DTT’s consulting division (the former Deloitte Tohmatsu Consulting) dissolved its capital relationship with Tohmatsu and left DTT → Braxton (2003-01) → became independent as ABeam Consulting (2003-11). The current “Deloitte Tohmatsu Consulting” is a separate lineage (the former Tohmatsu Consulting renamed in 2008-07 ) and has no direct relationship with ABeam
Around 2020 〜Early entry into digital-asset audit / Travel Rule consulting

Banking / insurance / securities

  • Tohmatsu is involved in audits of major securities firms, asset managers, life and non-life insurers, and regional banks, but the latest auditor of any individual company should be confirmed in EDINET primary sources, and this entry does not enumerate specific client names

Crypto-assets / digital assets

Travel Rule / AML consulting

M&A / FAS (separated from audit)

  • Deloitte Tohmatsu Financial Advisory (DTFA) handles M&A deal advisory

4. Major listed-FG client relationships (public basis)

Tohmatsu is broadly involved in audits of major financial-sector clients, but because the auditor of any individual company fluctuates over time, this entry limits itself to the verifiable scope:

  • Major VASPs — audit track record related to the bitFlyer group, etc. (public-basis references exist)

Note: the auditor of any individual company fluctuates over time. For the latest, confirm using the “auditor status” section of each company’s latest EDINET securities report or JICPA search as a primary source.

5. Regulation / supervision

  • Governing law: Certified Public Accountants Act
  • Registration: Japanese Institute of Certified Public Accountants (JICPA)
  • Supervision: the FSA’s Certified Public Accountants and Auditing Oversight Board (CPAAOB) conducts quality-control reviews / inspections
  • CPAAOB inspection results: an outline of the inspection results of major audit firms is published in the annual “Activities of the Certified Public Accountants and Auditing Oversight Board” report

Past disciplinary history

  • Individual administrative-disciplinary history should be confirmed each time on the basis of CPAAOB inspection results / FSA disclosures

6. Competitive relationships

Big 4Domestic brandStrength axis (public basis)
DeloitteTohmatsuM&A / FAS coordination, crypto-asset front-runner
EY[[financial-regulators/ey-shinnihonEY 新日本]]
PwC[[financial-regulators/pwc-aarataあらた]]
KPMG[[financial-regulators/kpmg-azsaあずさ]]

Tier 2: Taiyo Grant Thornton, BDO Sanyu & Co. .

Sources

[!info] Verification status confidence: likely (based on v1.0 public sources, 2026-05-24). The legal form, history, Big 4 affiliation, and crypto-asset front-runner status are of high reliability on a public basis. The auditor for individual clients should be confirmed each time in EDINET primary sources.