Mr Hiroyasu Kageshima > Ushijima & Partners > Tokyo, Japan > Lawyer Profile

Ushijima & Partners
TOKYO 100-6114

Work Department

Information Management / Cyber Security; Personal Information / Utilization of Personal Data; Intellectual Property; Internet / Media; System Development; Litigation Arbitration; General Corporate; Government Contracts; Compliance; M&A; Crisis Management / Handling of Misdoings; Startup Business Support




Admitted in Japan (2003); Ushijima & Partners (2003-); Partner, Ushijima & Partners (2013); Board Member, The Committee on Information Economy of Japan Productivity Center (2015-2017); Member, the My Number Special Review Committee, The Committee On Information Economy of the Japan Productivity Center (2015.7-2015.12); Member, The PrivacyMark Assessor Assessment Committee, Japan Information Processing Development Center (JIPDEC) (2017-); Advisor, Japan DPO Association (2019-)


Japanese (native) and English (fluent)


Dai-ni Tokyo Bar Association (2003); Entertainment Lawyers Network; Intellectual Property Lawyers Network; Intellectual Property Practice Group, Multilaw; Privacy & Information Security Practice Group, Multilaw


Hitotsubashi University (LL.B., 1998)

Lawyer Rankings

Japan > Dispute resolution: Independent local firms

Experienced in a range of international litigation and arbitration, Ushijima & Partners has particular strengths in corporate disputes, corporate control issues, real estate, securities and software development litigation. Another area of increasing activity is on line infringement cases, in which Hiroyasu Kageshima  is the key name. Osamu Inoue  is known for real estate and construction-related cases and transactions, including representing foreign companies; he co-leads the team with Shin Ushijima , who focuses on litigation and arbitration arising from international transactions, M&A, system development, anti-monopoly, labour and tax law.

Japan > TMT: Independent local firms

(Leading individuals: Bengoshi)

Hiroyasu KageshimaUshijima & Partners

As well as providing multidisciplinary support in the launch of new TMT sector businesses, Ushijima & Partners advises clients on traditional IP laws and laws concerning ICT technology, government policy and internet-related trends. The firm acts on a range of matters for a diverse client base that includes financial institutions, ICT companies, retail operators, manufacturers of pharmaceuticals and sporting events organizations. Another key strength is litigation related to big data analysis and internet based defamation. Practice head Hiroyasu Kageshima  handles IT system development, personal data, internet services, fintech, data leakage and defamation issues.