Patent AttorneyPh.D.(Science)

Yoshihide Tsunobuchi


Main fields of business

Patent searches such as Freedom to operate (FTO) Search, invalidity searches, prior art searches, technology trend analysis; domestic and foreign application and prosecution in chemistry, foods, machinery, etc.; oppositions, third-party observations, invalidation trials, patent infringement lawsuits, and training related to patent searches


As a patent search professional, I have experiensed in numerous searches in the fields of chemistry, foods, biotechnology, machinery, IT, etc.

With Ph.D. in chemistry and experience in writing numerous academic papers and patent applications as an inventor, I am capable of providing insights and advice not only from a legal perspective but also from the standpoint of a engineer and researcher.

Our firm is staffed with patent attorneys and lawyers who hold master’s and doctoral degrees, and we will strive to help our clients by providing a true one-stop service.


Mar. 2002

Graduated from Ichinomiya Senior High School

Mar. 2006

Graduated from Department of Engineering, Faculty of Applied Chemistry, The University of Tokyo

Mar. 2008

Completed Master's program, Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo

Apr. 2008

Adopted JSPS Research Fellowship for Young Scientists (DC1)

Mar. 2011

Completed Ph.D program without a Ph.D. degree, School of Science, Department of Cemistry, The University of Tokyo

Apr. 2011

Technology Transfer Service Co., Ltd/Registered Search Organization

Oct. 2012

Passed Patent Attorney Examination

Mar. 2014

Ph.D. (Science), The University of Tokyo

Mar. 2016

Registered as Patent Attorney

Apr. 2016

Joined Akiyama & Associates

Dec. 2017

First Prize, Patent Search Grand prix 2017, Gold Certification (Chemistry and Pharmaceuticals)

Jan. 2018

Registred for Specific Infringement Litigation Representation

Jun. 2019

Intellectual Property Analyst certified by Association of Intellectual Property Education (Patent)

Nov. 2023

Joined IP Law Firm Lexceed Tech (Partner)

Job position

Apr. 2018

Committee Member, Biotechnology and Life Sciences Committee, Japan Patent Attorneys Association (to FY 2019)

Apr. 2020

Vice-Chair, Executive Committee of Patent Search Grand prix (present post)


Associate Mentor, IP Acceleration Program for Startups (IPAS), Japan Patent Office

Aug. 2023

METI, Kyushu Bureau of Economy, Trade and Industry, Support Team Specialists(present post)

Books, Articles and Other Publications

“A consideration of Freedom to Operate Search” Patent, Jun. 2023, submitted “Points in invalidity searches of third-party patents” Intellectual Property Management, Sep. 2023 (Vol. 73 No. 9), Publisher: Japan Intellectual Property Association “Changes in prior arts and invalid documents in patent searches” Intellectual Property Management, Sep. 2022 (Vol. 72 No. 9), Publisher: Japan Intellectual Property Association (co-author) “Revised Edition Know-how for Freedom to operate (FTO) Search and Invalidity Search -Theory of Patent Search-” Apr. 2021, Research Institute of Economy, Trade and Industry “Knowledge of Patent Search for Patent Attorneys” Patent 75 (5) 3-15 2022 “New Year's Special Contribution, Know-how for Freedom to operate (FTO) Search and Invalidity Search -Theory of Patent Search-” Chizai Prism 18 (208) 8-38 2020 “Patent Strategy and Technology Development Trend of Pharmaceutical Modality” TECHNICAL INFORMATION INSTITUTE CO.,LTD, 2019, Chapter 2, Section 4, Chapter 2, Section 5 , Chapter 5, Section 4, Chapter 6, Section 4 (co-author) “Study of asserting and proving “impossible or impractical circumstances” in Product-by-Process claims” Patent,69 (9) 71-81 2016 “Synthesis of a metal oxide with a room-temperature photoreversible phase transition” S. Ohkoshi, Y. Tsunobuchi, T. Matsuda, K. Hashimoto, A. Namai, F. Hakoe, and H. Tokoro, Nature Chemistry, 2, 539-545 (2010). “Light-induced spin-crossover magnet” S. Ohkoshi, K. Imoto, Y. Tsunobuchi, S. Takano, and H. Tokoro, Nature Chemistry, 3, 564-569 (2011) “Synthesis and alcohol vapor sensitivity of a ferromagnetic copper-tungsten bimetallic assembly” S. Ohkoshi, Y. Tsunobuchi, H. Takahashi, T. Hozumi, M. Shiro, and K. Hashimoto, J. Am. Chem. Soc., 129, 3084-3085 (2007) “High proton conductivity in Prussian blue analogs and the interference effect by magnetic ordering” S. Ohkoshi, K. Nakagawa, K. Tomono, K. Imoto, Y. Tsunobuchi, and H. Tokoro, J. Am. Chem. Soc., 132, 6620-6621 (2010)


Nov. 2023, Sep. 2022, Nov. 2021, “Know-how for Freedom to operate (FTO) Search and Invalidity Search -Theory of Patent Search-” Research Institute of Economy, Trade and Industry

Oct. 2023, Japan Patent Attorneys Association, “Basic Knowledge of Freedom to operate (FTO) Search for Patent Attorneys”

Oct. 2020, “Practical Issues for Researchers”, Intensive course, Graduate School of Engineering, The University of Tokyo

Please feel free to contact us.
Online consultations are also
available via ZOOM or Teams.

Contact Form