BDO Sanyu & Co.
HQ: JapanVerified
Tokyo-based audit firm (BDO member firm in Japan) registered as an ISMAP audit institution for Japanese government cloud security assessments.
ISMAP audit institutions in Tokyo prefecture, Japan
6 Verified · 2 registry-listed · ISMAP · office in Tokyo prefecture, Japan · Verified first · All ISMAP firms · All firms in Tokyo prefecture, Japan
These firms appear on Japan’s official ISMAP audit-institution list and have a published office in Tokyo prefecture, Japan. Listings are checked facts, not endorsements or rankings.
Deloitte Touche Tohmatsu LLC
HQ: JapanVerified
Tokyo-based audit firm of the Deloitte Tohmatsu Group registered as an ISMAP audit institution for Japanese government cloud security assessments.
Ernst & Young ShinNihon LLC (EY ShinNihon)
HQ: JapanVerified
Tokyo-based audit firm of the EY network registered as an ISMAP audit institution for Japanese government cloud security assessments.
Japan Security Rating Organization (JaSRO)
HQ: JapanVerified
Tokyo-based general incorporated association registered as an ISMAP audit institution, offering ISMAP information security audits.
KPMG AZSA LLC
HQ: JapanVerified
Tokyo-based audit firm of the KPMG network registered as an ISMAP audit institution for Japanese government cloud security assessments.
PwC Japan LLC
HQ: JapanVerified
Tokyo-based audit firm of the PwC network registered as an ISMAP audit institution for Japanese government cloud security assessments, with offices in Nagoya, Kyoto, Osaka and Fukuoka.
Tokyo, Tokyo · Nagoya, Aichi · Kyoto, Kyoto · +2 more
Ark LLC (アーク有限責任監査法人)
HQ: JapanRegistry-listed
Ark LLC (アーク有限責任監査法人) appears on the ISMAP audit institution list as of 2026-10-27. This firm appears on the official registry, not independently verified by Agent Index.
Grant Thornton Taiyo LLC (太陽有限責任監査法人)
HQ: JapanRegistry-listed
Grant Thornton Taiyo LLC (太陽有限責任監査法人) appears on the ISMAP audit institution list as of 2026-10-27. This firm appears on the official registry, not independently verified by Agent Index.
Other frameworks in Tokyo prefecture, Japan: ISO 27001 (20) · PCI DSS (14) · ISO 27701 (5)
Other ISMAP locations: Japan · Tokyo city, Japan
FAQ
How many ISMAP firms are listed in Tokyo prefecture, Japan?
6 Verified · 2 registry-listed firms are listed for ISMAP with an office in Tokyo prefecture, Japan. This is not a ranking.
Which registry do you check for ISMAP?
We check ISMAP audit-institution list. A framework tag appears only when that registry listed the firm at last check.
Which cities have the most listed firms?
Tokyo (8), Fukuoka (1), Kyoto (1), Nagoya (1), Osaka (1).
How do I get matched with a listed firm?
Use Get matched or the auditor-match form on this page. A listing is a set of checked facts, not an endorsement. Get matched.
See the listing method. Pages exist only where at least 3 Verified firms match both the framework and the location.
Related guides: ISMAP audit institutions
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