About us

Profiles

Representative Profile

BASE ONE Tax Co.
Co-CEO
Takeshi
Kitazawa

As a Co-CEO of BASE ONE Tax Co.
providing tax advice for startups to listed companies. Prior to this, over the past approximately 10 years at Ernst & Young Tax Co, providing tax advisory services to Japanese companies, including publicly listed corporations, as well as foreign multinational companies.

Experienced with tax accrual reviews and assisting clients with tax audit defense and resolving disputes with the Japanese tax authorities.

Experienced in IT, consumer products, software, entertainment, trading house, automotive, oil & gas.

Co-authored the book titled “Q&A Japanese Group Relief System-Practical Work and Procedures” by SHINNIPPON-HOKI PUBLISHING CO., LTD

Certified public tax accountant in Japan

BASE ONE Tax Co.
Co-CEO
Kosuke
Sakaue

Founded BASE ONE TAX Co. in April 2023 and serves as Co-CEO, providing accounting and tax advice for startups to listed companies.

Worked as a financial advisor at Deloitte Tohmatsu Financial Advisory LLC from 2019 to 2023 for 4 years. Experienced with M&A related FA service, hands-on assistance for startups, restructuring PMO support, business carve-out support, etc.

Worked in the Corporate Advisory Department of Mizuho Bank Ltd for 5 years from 2014 to 2019. Experience with M&A related FA service, LBO /MBO finance, advices for business succession, valuation reports service, etc.

From 2010 to2014, worked at KPMG for 4 years. experienced in audit services for SEC-listed companies.

Certified public accountant in Japan / Certified public tax accountant in Japan

Partner Profile

BASE ONE Tax Co.
Partner
Minoru
Akutsu

Tax Accountant with approximately 10 years of experience in Deloitte Tohmatsu Tax Co. and Ernst & Young Tax Co, since 2012.

Engaged in top-level tax consulting services, primarily focused on organizational restructuring, consolidated taxation, and international taxation, for a wide range of industries, including major Japanese listed companies and global multinational companies’ Japanese subsidiaries. (Final position held: Manager)

Subsequently joined the tax team of Fast Retailing Co., Ltd., serving as the Domestic Tax Leader. Gained extensive experience as an in-house tax advisor, handling tasks such as preparation of tax returns for the company and its group companies, withholding tax management, tax consultation, tax investigation support, and communication with national tax authorities.

Co-authored the book titled “Q&A Japanese Group Relief System-Practical Work and Procedures” by SHINNIPPON-HOKI PUBLISHING CO., LTD

Certified public tax accountant in Japan

Our mission

BASE ONE Tax Co. is a group of professionals that has been set up to contribute to the further development of the society and industry that our predecessors have created up to now. In the future, Japan, where we were born and raised, will need to sustain its society with a smaller population and increase its global competitiveness. We believe that it will become increasingly important to further concentrate on limited management resources by investing in new and growing businesses and strengthening core businesses, as well as reviewing the business portfolio from time to time and implementing business restructuring accordingly.

Our team members include a Certified Public Tax Accountant who has advised many companies, including Japanese and foreign-affiliated companies on their tax affairs, and a certified public accountant with a background in financial advisory, which requires a wide range of knowledge and skills in financial accounting, taxation and law. We also have a university professor as an advisor who is well versed in taxation practice, theories, and precedents, and who specializes in providing theories to achieve legal relief for taxpayers.

In the uncertain business environment, which varies from industry to industry, you will need to make prompt and decisive decisions after considering risk and returns from various angles. As your expert and your best partner, we would be happy to contribute to your business in any way.
We would also like to be an organization that constantly challenges itself to create new values as a specialist.

Management
Philosophy

  • Contribute to the sound development of our clients’ businesses with our knowledge and experience as experts in each field.

  • Act with integrity, thinking about the future of people involved in our business and the lives of their families.

  • We will nurture human resources who will create a new era, always valuing the spirit of challenge.

Company

Company name
BASE ONE Tax Co.
Location
Shinagawa Seaside East Tower 15F 4-12-8, Higashishinagawa,
Shinagawa-ku Tokyo-to 140-0002 Japan
Representative
阪上 晃亮 Kosuke Sakaue
北澤 武士 Takeshi Kitazawa
Qualifications
Certified Public Accountant /
Certified Public Tax Accountant