Last updated on Nov. 1, 2025

Company Name ARK LLC
Establishment August 1982
Capital 80,000,000 JPY
CEO Nikaido Hirofumi
Services Auditing services (Voluntary, Statutory).
Advisory activities on IPO, IFRS and the establishment of internal control system.
Various assistance related with public enterprise accounting, etc.
Partners & Staff
Partners 51
CPAs 67
Assistant CPAs 39
USCPA 4
Assistant USCPA 2
Other Professionals 5
Administrative Staffs 39
Total 207
Clients
Listed companies 69
Unlisted companies 31
Incorporated administrative agencies 5
Educational institutions 6
Labor union 7
Others 12
Total 130
Global Network Kreston Global

kreston grobal
Official Qualifications

and Certifications		 Information Security Management System (ISMS) Certification

  • Certification Standards
    ISO/IEC 27001:2022
  • Scope of Certification
    Information security management in system auditsInformation security management in corporate operation
  • Certification Date
    December 29, 2023
ISMS
Affiliations Japanese Institute of Certified Public Accountants / Financial Accounting Standards Foundation / Japan Information Security Audit Association / International Computer Auditing Education Association / The Japanese Association of Assurance Organizations for Sustainability Information
Financial institutions Sumitomo Mitsui Banking Corporation / MUFG Bank, Ltd. / Mizuho Corporate Bank, Ltd. / Resona Bank, Limited
Address 1-23-3 Nishi-Shinjuku, Shinjuku-ku, Tokyo, Japan, 160-0023
TEL  03-3342-5967
FAX  03-3342-5972
For other sites, please see the Location page.
Contact info@ark-audit.com