日本語 English
  1. TOP
  2. Member

We would like to introduce the members of Ashitaba International Patent Office.

Patent Attorney

Yasuyuki Sakata

Registration No.13125

Career Background

  • Graduated from the Department of Applied Science, Graduate School of Engineering, Kansai University (Research on organometallic complex catalysts)
  • Engaged in research and development at a chemical manufacturer for 12 years.
  • Joined Akatsuka International Patent Office, 2002
  • Registered as patent attorney, 2003
  • Established Ashitaba International Patent Office with Patent Attorney Akatsuka and Patent Attorney Shibuya in 2017

Technical fields

  • Organic chemistry
  • Inorganic chemistry
  • Metals
  • Oil refining
  • Water treatment
  • Machinery

Areas of Practice

Domestic and foreign patent applications, prosecution, oppositions, and expert opinions in the fields of chemistry and machinery.Domestic and foreign applications and prosecution of designs and trademarks.

Outside Activities

Member of Saitama Committee, Kanto Association of Japan Patent Attorneys Association

Partner Patent Attorney

Ken Shibuya

Registration No.12532

Brief Personal History

  • 1993 Graduated from Kanazawa University, Faculty of Engineering, Department of Materials Chemistry and Chemical Engineering
  • Engaged in research and development work and intellectual property work for a chemical manufacturer for about 10 years.
  • Registered as a patent attorney in 2002.Joined Akatsuka International Patent Office after working at a patent firm in Tokyo
  • Established of Ashitaba International Patent Office in 2017

Main fields of practice

  • Chemistry (organic, inorganic, polymer)
  • Metals
  • Petroleum refining
  • Environmental technology
  • Food
  • Machinery
  • Civil engineering

Areas of practice

Domestic and foreign patent applications, prosecution, opposition, expert opinion

Partner Patent Attorney

Kenji Akatsuka

Registration No.9868

Career Background

  • Graduated from Nagoya Institute of Technology, Department of Mechanical Engineering.
  • Contract Researcher, Tokyo Institute of Technology, Department of Chemical Engineering, 1957.
  • Engaged in research and development for 17 years and intellectual property for 5 years at an oil company.
  • Registered as a patent attorney in 1989.
  • Established Akatsuka International Patent Firm, 1996.
  • Co-owner of Ashitaba International Patent Office, 2017.

Technical fields

  • Machinery
  • Civil engineering and construction
  • Organic chemistry
  • Inorganic chemistry

Areas of practice

Domestic and foreign prosecution and prosecution of designs, domestic patent.prosecution and prosecution of mechanical patents, and handling of prosecution and prosecution of patent applications in Japan and abroad.

Partner Patent Attorney

Shinichi Ishikawa

Registration No.14883

Career Background

  • Graduated from the Department of Marine and Natural Sciences, Faculty of Science, University of the Ryukyus, majoring in biology.
  • After working at Mitsubishi Chemical Life Science Institute and Suzuye and Suzuye Patent Firm, he is currently in his current position.
  • Graduated from Tokyo Denki University, Faculty of Engineering, Department of Mechanical Engineering, Faculty II, as a working student.
  • Registered as a patent attorney in 2006.
  • Registered as a patent attorney in 2011 with additional registration for representation in specific infringement litigations
  • Joined Ashitaba International Patent Office in 2019
  • Partner of Ashitaba International Patent Office in 2023

Technical fields

  • Machinery (structure, control)
  • Biotechnology

Areas of Practice

Domestic and foreign patent applications, prosecution, oppositions, invalidations, expert opinions.Domestic and foreign design and trademark applications and prosecutions.

Outside Activities

Member of the Steering Committee of the Consultation Office, Kanto Patent Attorneys Association, Japan Patent Attorneys Association (2021)
Vice-Chairman of the Steering Committee of the Consultation Office, Kanto Patent Attorneys Association, Japan Patent Attorneys Association (2022)
2023 Chairman of the Steering Committee of the Consultation Office, Kanto Patent Attorneys Association
2022- Consultant, Standing Intellectual Property Consultation Office, Kanto Patent Attorneys Association, Japan Patent Attorneys Association

Patent Attorney

Sachiko Shibata

Registration No.19435

Specific Infringement Litigation Representation (Additional Information)

Career Background

  • B.S. in Physics, Faculty of Science, Ochanomizu University.
  • M.S., Materials Science and Engineering, Graduate School of Engineering, The University of Tokyo.
  • 2008-2019 Patent Firm.
  • 2019 – 2021 Researcher, The Institute of Intellectual Property of the Foundation for Intellectual Property (Seconded from Japan Patent Attorneys Association).
  • 2021- Part-time Researcher, The Institute of Intellectual Property of the Foundation for Intellectual Property.
  • 2021- Ashitaba International Patent Office

Technical fields

  • Physics
  • Chemistry (metal, material, inorganic)
  • structure
  • control
  • business model,etc.

Areas of responsibility

Domestic and foreign patents, designs, trademarks (applications, prosecution, opposition, expert opinion, etc.)

Activities

Lecture at the 8th Rikejo-Future Symposium, Ochanomizu University, 2017
2018 Ochanomizu University Rekejo-Future Symposium @ Yamagata Lecture
2019, 2020 Lecturer at Graduate School of Intellectual Property, Osaka Prefecture University
2020 Ochanomizu University, The 24th Rikejo-Future Symposium, Lecture
Lecture at the 35th Rikejo-Future Symposium at Ochanomizu University in 2022

  • domestic clerical staff3
  • foreign affairs staff2