Yuka Masunari


Yuka Masunari Japanese


Yuka Masunari, Esq., is an attorney-at-law admitted in Japan. She joined T. Kunihiro & Co., Attorneys-at-Law in 2014 after working for several years at another international law firm in Tokyo. Throughout her career, she has handled international and domestic transactions, dispute resolution and litigation. Ms. Masunari also has expertise in the area of corporate affairs and internal controls, especially in the establishment and operation of whistle-blowing systems.

Practice Areas

  • Whistle-blowing systems (establishment and operation)
  • Compliance, corporate governance and internal controls
  • International and domestic transactions, dispute resolution and litigation


T. Kunihiro & Co., Attorneys-at-Law
100-0006 Sanshikaikan Bldg. 2F, 1-9-4 Yurakucho, Chiyoda-ku, Tokyo, Japan
TEL: +81-3-5222-5280
FAX: +81-3-5222-5281
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Japanese, English


Daini Tokyo Bar Association


Graduated from Tokyo University of Foreign Studies (2007)
Graduated from Doshisha Law School (2009)


Handbook of Compliance and Internal Controls (Japanese) Shoji Homu, 2017 (Co-Author)
Handbook of Compliance and Internal Controls II (Japanese) Shoji Homu, 2019 (Co-Author)

Seminars and Lectures

Compliance Seminar on Internal Controls for the employees of Hanamaki City Office (2015)


Whistle-blowing systems are of significant importance for purposes of internal control, and serve as one of the most effective means for identifying and dealing with problems arising within companies and other entities. Based on my experience in developing and fine-tuning whistle-blowing systems for numerous clients, I am able to provide advice to other entities and organizations on the establishment and operation such systems, as well as to offer assistance in the conduct of internal investigations.

In recent years, many companies have grown increasingly sensitive to issues of power harassment, sexual harassment and other forms of harassment which degrade the work environment, and our firm has the experience and expertise to address these concerns, and to assist our clients in their making improvements in order to better overall workplace conditions.