Always as Your Best Partner


Management has many problems such as start-up, company establishment, difficult accounting processing, payment of taxes, construction of internal control system, accounting audit etc.
Yasunaga Firm is a professional field specialist essential for the business              as a solution provider that will prepare a good service to solve the problems.


Accounting Services

・Support for Preparation of Financial and Statements and Consolidated Financial     


・Support for Preparation of Cash Flow Statements

・Support for Preparation of English-Based Financial Statements

・Support for Preparation of Annual Reports

Consulting Services

Support for Formation of a New Company

・Support for Creation of Internal Controls

・Support for Response of External Audit

・Forensic Audit (Support for Fraud Accounting Investigation)


Tax services

Preparation of Corporate Tax returns

・Preparation of Consumption Tax returns

・Preparation of Individual Tax returns

・Preparation of Inheritance Tax returns

・Consultation for Tax Related Issues (International Taxation、 Tax Treaty)

Representative Profile


Faculty of Economics, The University of Nagasaki


  ・Certified Public Accountant (Japan) 2012

・Enrolled Agent (US)    2018

Work Experience 

・有限責任監査法人トーマツ  2008~2017

・Certified Tax Accountant (Japan)    2018

・辻・本郷税理士法人  2017~2018

Seikan Yasunaga

Service fee

・Corporate tax support from 30,000 yen per month

・Sole proprietorship tax support from 15,000 yen per month

・Individual income tax support for Capital gain from 50,000 yen, etc.

 I will provide an Estimate based on your tax situation.


【Business hours】10:00 a.m.~5:00 p.m.


【Inquiry Form】 You can contact us at any time by using Inquiry Form.


I am able to contact  you by Zoom or Skype.

Office Location

・3-2-5 Maizuru, Chuo-Ku, Fukuoka-City​, Fukuoka Prefucture