Our Professionals

Rumi ICHIKAWA

Rumi ICHIKAWA 市川 ルミ Patent Attorney

Executive Partner

Technical Specialty Electricity and Electronics
Practice Areas Drafting and Filing of Patent/utility model application; OA(Office action) response; Suits against trial decision; Technical analysis and advice; Copyright consultation
Experience and Qualifications After graduating from the Department of Electrical Engineering, School of Science and Engineering, Waseda University, Ms. Ichikawa engaged in consulting at a foreign computer company and a management consulting firm. She became a registered attorney in 2001, joined us in 2002 and opened our Tokyo Branch Office the same year. Ms. Ichikawa has held positions including a temporary committee member of JPO industrial property council and Vice President of the Japanese Patent Attorney Association.
Tetsuya IKKAKU

Tetsuya IKKAKU 一角 哲也 Patent Attorney

Managing Partner

Technical Specialty Mechanics
Practice Areas Drafting and Filing of Patent/utility model application; OA(Office action) response; Technical analysis and advice
Experience and Qualifications After graduating from the Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, Mr. Ikkaku worked at a steel manufacturer as a water treatment plant engineer. He joined us in 2006 and became a registered attorney the same year. Mr. Ikkaku also became a registered professional engineer (Jp) (water supply & sewage) in 2007 and was granted the Supplementary Note of Specific Infringement Lawsuit Counsel in 2010.
Masahiro TSUJI

Masahiro TSUJI 辻 政宏 Patent Attorney

Managing Partner

Technical Specialty Mechanics
Practice Areas Drafting and Filing of Patent/utility model application; OA(Office action) response; Technical analysis and advice
Experience and Qualifications After graduating from the Department of Environmental Design, Graduate School of Engineering, Kyoto University, Mr. Tsuji worked in environmental assessment at a construction consultant firm. He was then engaged in the technical development of collision safety simulation for an automobile-related company, and later worked at another IP law firm. Mr. Tsuji became a registered attorney in 2010 and joined us in 2013. He was granted the Supplementary Note of Specific Infringement Lawsuit Counsel in 2013.

Patent Attorney

Kinuyo ARASHI

Kinuyo ARASHI 嵐 絹代 Patent Attorney

Tokyo Office

Technical Specialty Mechanics
Practice Areas Drafting and Filing of Patent/utility model application; OA(Office action) response
Experience and Qualifications After graduating from the Department of Architecture, Graduate School of Natural Science, Kobe University,
Ms. Arashi studied abroad and participated in an internship program in the UK.
She joined us in 2001 and became a registered attorney in 2009.
Kazuhiro UCHIDA

Kazuhiro UCHIDA 内田 和宏 Patent Attorney

Osaka Office

Technical Specialty Electricity and Electronics
Practice Areas Drafting and Filing of Patent/utility model application; OA(Office action) response
Experience and Qualifications After graduating from the Department of Electrical and Computer Engineering, Graduate School of Engineering, Osaka Prefecture University, Mr. Uchida worked in research and development at an electric appliance manufacturer. He joined us in 2004 and became a registered attorney in 2012.
Miho KAMIOKA

Miho KAMIOKA 上岡 美穂 Patent Attorney

Osaka Office

Technical Specialty Mechanics
Practice Areas Drafting and Filing of Patent/utility model application; OA(Office action) response
Experience and Qualifications After graduating from the Department of Architecture as well as the Department of Civil Engineering, Faculty of Engineering, Kobe University, Ms. Kamioka engaged in landscape architecture design at a landscape design company. She joined us in 2006 and became a registered attorney in 2007.
Masaki SAITO

Masaki SAITO 齊藤 正樹 Patent Attorney

Osaka Office

Technical Specialty Mechanics
Practice Areas Drafting and Filing of Patent/utility model application; OA(Office action) response
Experience and Qualifications After graduating from the Department of applied physics, Graduate School of Engineering, the University of Tokyo, Mr. Saito engaged in the development of LCD technologies at an electronic appliance company. He joined us in 2016 and became a registered attorney in the same year.
Yukiko TAZOE

Yukiko TAZOE 田添 由紀子 Patent Attorney

Osaka Office

Technical Specialty Chemistry
Practice Areas Drafting and Filing of Patent/utility model application; OA(Office action) response
Experience and Qualifications After graduating from the Department of Agricultural Chemistry, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University. Ms. Tazoe worked for a manufacturer of physical/ chemical and medical equipment. She also worked in an IP research firm and other IP law firms, before joining us in 2019. She was registered as a patent attorney in 2013.
Takahiko TOMITA

Takahiko TOMITA 富田 尊彦 Patent Attorney

the Head of Sapporo Tomita Office

Technical Specialty Electricity and Electronics
Practice Areas Drafting and Filing of Patent/utility model, trademark application; OA(Office action) response; Seminars and consultation on intellectual property; Technical analysis and advice
Experience and Qualifications Mr. Tomita joined us in 2004 after graduating from the Department of Physics, Graduate school of Science, Hokkaido University. He became a registered attorney in 2007 and opened our Sapporo Branch (Sapporo Tomita office) in Hokkaido in the same year. Mr. Tomita has been a vice chairman of the Hokkaido Branch of the Japan Patent Attorneys’ Association from 2012 to 2014. He also serves as a parttime lecturer at national university corporations in Hokkaido.
Eriko FUJIKAWA

Eriko FUJIKAWA 藤川 江梨子 Patent Attorney

Sapporo Tomita Office

Technical Specialty Chemistry, Biotechnology
Practice Areas Drafting and Filing of Patent/utility model, trademark application; OA(Office action) response
Experience and Qualifications After graduating from the Department of Bioresources Production Sciences, Graduate School of Agriculture, Hokkaido University, Ms. Fujikawa worked at a municipality. She became a registered attorney in 2013 and joined us in the same year.
Yoshihiro HOSOI

Yoshihiro HOSOI 細井 義博 Patent Attorney

Osaka Office

Technical Specialty Mechanics
Practice Areas Drafting and Filing of Patent/utility model application; OA(Office action) response
Experience and Qualifications After graduating from the Department of Systems Science, School of Engineering Science, Osaka University, Mr. Hosoi joined us in 2008. He became a registered patent attorney in 2011.
Kenichi HORII

Kenichi HORII 堀居 健一 Patent Attorney

Osaka Office

Technical Specialty Electricity and Electronics, Information Technology, and Mechanics
Practice Areas Drafting and Filing of Patent/utility model application; OA (Office action) response
Experience and Qualifications Mr. Horii joined us in 2006 after graduating from Department of Electrical and Electronic Engineering, College of Science and Engineering, Ritsumeikan University. He became a registered atttorney in 2024.
Kimiko YANO

Kimiko YANO 矢野 公子 Patent Attorney

Tokyo Office

Technical Specialty Trademarks
Practice Areas Drafting and Filing of trademark application; OA(Office action) response; Consultation about domestic/international copyrights and counterfeit prevention
Experience and Qualifications Ms. Yano graduated from the Department of English and American Literature, Faculty of Letters and the Department of Civil Law, Graduate School of Law, Keio University. She became a registered patent attorney in 1985 and was granted the Supplementary Note of Specific Infringement Lawsuit Counsel in 2006. After working at a foreign-affiliated chemical company and a law firm in Tokyo, she started independent consulting service for communication and manufacturing companies on domestic and international trademarks and counterfeit prevention. She also taught at the Graduate School of intellectual property, Correspondence University. Ms. Yano joined us as an advisor in April 2022.
Risa WAKAMA

Risa WAKAMA 若間 理佐 Patent Attorney

Osaka Office

Technical Specialty Chemistry
Practice Areas Drafting and Filing of Patent/utility model, trademark application; OA(Office action) response
Experience and Qualifications Ms. Wakama joined us in 2006 after graduating from the Department of Material Science and Engineering, Graduate School of Engineering, Osaka Prefecture University. She became a registered attorney in 2007.

Founder

Yoshiyuki KAJI

Yoshiyuki KAJI 梶 良之 Patent Attorney

Founder

Technical Specialty Mechanics
Practice Areas Suits against trial decisions; Invalidation trials; Infringement lawsuits; Technical analysis and advice
Experience and Qualifications After graduating from the Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, Mr. Kaji engaged in plastic/rubber machinery design at a steel manufacturer. He then transferred to the IP Department of the same company, where he engaged in domestic and foreign patent filing process and also a number of patent litigations cases in the US. He became a registered attorney in 1982.
In 1988 Mr. Kaji independently established the Kaji Patent Law Firm. He was granted the Supplementary Note of Specific Infringement Lawsuit Counsel in 2004.
Mr. Kaji is also a member of the Japan Patent Attorneys’ Association, Kansai Patent Study Group (Tokkyo Kenkyukai), Licensing Executives Society Japan, Japan Intellectual Property Association, and The Asian Patent Attorneys’ Association.

Advisor

Masashi MIZUTA

Masashi MIZUTA 水田 正志 Ph.D.

Tokyo Office

Technical Specialty Electric and Electronics (Materials, Devices)
Practice Areas Advisor, Doctor of Engineering
Experience and Qualifications After receiving his Ph.D. degree from Tokyo Institute of Technology, Dr. Mizuta mainly engaged in studies of semiconductor devices and materials as a research associate at the Department of ECE, University of California, Santa Barbara, an assistant professor at Tokyo Institute of Technology, and a research fellow at Fundamental Research Labs. of an electric company. Dr. Mizuta was later engaged in development and manufacturing of a semiconductor fabrication instruments in machinery firms. His career also includes a director of a research institute at an electric company where he proposed IP strategies, and a member of the IP-Examination Committee at Japan Science and Technology Agency.