Major Practice Areas
Employment and Labor / Dispute Resolution / Mergers & Acquisitions / Corporate / Restructuring and Insolvency
Other Practice Areas


Ryusaku Saito focuses mainly on matters relating to labor and employment law.  Mr. Saito has experience in resolving labor-related disputes, investigating harassment cases, and revising company employment regulations to comply with revisions to labor law and regulations.  He also has experience in M&A transactions for small/medium-sized companies and listed corporations in a variety of industries, as well as post-M&A organizational management intergration (PMI) projects, and is knowledgeable about legal issues related to labor and employment issues arising through M&A transactions.  With respect to labor and employment matters, which often involve interpersonal disputes, Mr. Saito believes that the best solution can be found by understanding not only the client’s position but also the other party’s position and sentiments. 

(Due to being appointed the Representative Director of Big Circle Group Holdings Co., Ltd., as of April 1, 2023, Ryusaku Saito is currently not practicing as an attorney.)

Education & Professional Career

Apr 2023 – PresentBig Circle Group Holdings Co., Ltd., Representative Director
Jan 2019Joined Kitahama Partners
Dec 2018Graduated from the Legal Training and Research Institute of the Supreme Court of Japan; Admitted to practice in Japan
Mar 2017Hitotsubashi University School of Law (J.D.)
Mar 2015Chuo University (LL.B.)