Chairperson, The Sun-Based Economy Association (February, 2009 - )
Honorary Co-Chair, World Justice Project (July, 2008 - )
Director, Japan Core Partner Inc. (August, 2010-)
Director, Kuni Umi Asset Management Co. Ltd. (March, 2012-)
Statutory Auditor, SIP Financial Group Corporation (May, 2013-)
Statutory Auditor, Strategic IR Insight Inc. (May, 2013-)
Director, BroadBand Tower, Inc. (September, 2015-)
Director, Ihara Chemical Industry Co., Ltd. (January, 2016-)
Writings
"What Lay-Judges System will bring about ?"(in Practice! Q&A of Lay-Judges System, Gyosei Limited)
"On the Rule of Law in Japan"(Japanese translation of a speech in English, Rule of Law No. 154, Journal of the Japan Bar)
"How the Supreme Court should function in future Part I and Part II" (Niben Frontier October and November, 2007 issues, Journal of Daini Tokyo Bar Association)