Our People



Admitted to Tokyo Bar Association in 1968
Foreign Language English
Contact Phone: +81-(0)3-6265-4680
Fax: +81-(0)3-6265-4681
Practice Areas Mergers & Acquisitions, Settlement of Disputes, Domestic and Foreign Corporate Legal Affairs, Domestic and Cross-Border Dispute, Joint Venture, International Transaction in General, Mediation and Arbitration
Membership Board of Visitors in Columbia University Law School, Private International Law Association of Japan, Japan Association of Arbitrators, Rotary club (Tokyo Ebisu Rotary club)

Qualification and Experience

Jan. 2017 - present Advisor, T&K Partners
2016 Representative Vice President of OK Co., Ltd (2016-2017)
2015 Established a Fund “S.J. YANASE FOUNDATION”
2014 The CEO of OK Co., Ltd. (2014-2016)
2011 Legal Advisor at ABMF Tokyo Stock Exchange (2011-2014)
2010 Director at Insurance Ombudsman Association (2010-2014)
2009 Visiting Professor and Senior Research Worker at the faculty of Law, Waseda University (a creation of renewed company registration in a mature civil society/ Waseda University Global COE Project) (2009-2011) Invited and attended at Cross-border M&A Symposium (the sponsor: New York University the Leonard N. Stern School of Business, Peking University Guandhua Business School and Cambridge Judge Business School) (every other year from 2009)
2008 Outside Member of Committee of Corporate Ethics at MEGMILK SNOW BRAND Co., Ltd. (2008-2014)
2007 Outside Auditor at Hogy Medical Co., Ltd. (present post) Judge at International Arbitration Workshop in Sophia University Law school. Judge at Intercollegiate Negotiation Contest. Chairman at Japan Financial ADR/Ombudsman Study Group (2007-2007)
2006 Special Advisor at Nagashima, Ohno & Tsunematsu (2006-2014) Outside Director at OK Co., Ltd. (2006-2014) Established Yanase Law Firm.
2005 Affiliate Professor at HOSEI University Law School (international private law, international trading law and international civil procedure) (2005-2011) Councillor at Japan Association of Arbitrators (2005-2014)
2002 Columbia University Law School, as a member of Board of Visitors
2000 Established Nagashima, Ohno & Tsunematsu (Merged with Nagashima & Ohno) Chairman at Nagashima, Ohno & Tsunematsu (2000-2006)
1993 Managing Partner at Tsunematsu, Yanase & Sekine
1987 Established Tsunematsu, Yanase & Sekine
1973 Blakemore & Mitsuki
1972 Columbia University Law School, LL.M (a member of Fulbright Fellowships) Jones Day Reavis & Pouge, The United States
1966 Graduated from the Faculty of Law, Tokyo University