Koji Arai

Koji Arai

Koji Arai is a licensed social and labor consultant who analyzes and calculates pension, social, and labor insurance amounts as well as drafts the appropriate company applications for such insurance. He is also experienced in payroll services, statutory filings to the social insurance agencies, filings for new hires and employee departures, and labor management, tax, social insurance consulting for foreigners and Japanese expatriates.


Social and Labor Insurance Consultant


Public Consultant on Social and Labor Insurance (2011)


Japan Federation of Labor and Social Security Attorney’s Associations

Areas of Expertise

Labor management consulting
Social insurance
Tax consulting

Professional Experience

1998 – present

Sonderhoff & Einsel, Law and Patent Office

1990 – 1992

Mabuchimoter K.K. 1988 to 2001 Tanaka & Takahashi Law Office


1996 – 1998

Toyo University, Master of Law


Japanese, English