Aoyama Sogo Accounting Office
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About Us
Since our establishment in May 1999, Aoyama Sogo Accounting Office has been pursuing the policy of “Client First” based on our action principles of ISQ (innovation, speed, quality). Providing flexible and innovative approaches beyond conventional practices of accounting firms, we have been expanding our business not only in domestic but to worldwide financial markets.

Now that we have formed a group of companies (ASA Group), whose core is the accounting office, we continue to strive to be a financial service provider that is capable of satisfying a wide variety of client needs ranging from development of new business areas to project management and administration.
Company name Aoyama Sogo Accounting Office
Establishment August 25, 1999
Partners
Founding Partner & CEO Koichi Yokoyama
Certified Public Accountant / Licensed Tax Accountant
Founding Partner & CEO Kazuhiro Matsuzawa
Certified Public Accountant / Licensed Tax Accountant
Founding Partner & CEO Masaki Aguni
Certified Public Accountant / Licensed Tax Accountant
Senior Partner Junichi Naganawa
Certified Public Accountant
Partner Kiyohiko Ide
Licensed Tax Accountant
Auditor Masayoshi Ogawa
Licensed Tax Accountant
Location Kamiyacho Central Place 6th Floor, 4-3-13 Toranomon, Minato-ku, Tokyo 105-0001 JAPAN
Number of Employees 107(as of July 2010)
6 certified public accountants
16 certified public tax accountants (including tax accountant qualification owners)
2 judicial scriveners (including judicial scrivener qualification owners)
Organizational Structure Organization chart
Type of Business Accounting and tax services
Cash management service
Due diligence service
Reporting service (for investors, financial institutions and parent companies)
M&A, business rehabilitation/reorganization services (consulting support)
IPO and disclosure support services
Consulting service on cross-border business
Corporation establishment and liquidation services (registration and tax servicea) *We work in collaboration with judicial scriveners.
SPC administration service
Data analysis and processing services
Main Clients Foreign and domestic banks, trust banks, securities companies, insurance companies, investment consulting companies, nonbanking financial institutions, servicer companies, real estate developers, etc.
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