Our Professionals

Yoshiyuki KAJI

Yoshiyuki KAJI Yoshiyuki KAJI Patent Attorney

Founder and Managing Partner

Technical Specialty Mechanics
Practice Areas Suits against trial decisions; Invalidation trials; Infringement lawsuits; Technical analysis and advice
Experience and Qualifications After earning a Master’s degree in Mechanical Engineering from Osaka University, Mr. Kaji designed
industrial machinery at a steel production company.
Mr. Kaji started his career in IP when he was transferred to the IP department of the same company,
where he handled patent applications inside and outside Japan and a number of patent litigations in
the US. He became a registered attorney in 1982 and founded the Kaji Patent Law Firm in 1988. 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 Tokkyo Kenkyukai, Licensing Executives Society Japan, Japan Intellectual Property Association, and The Asian Patent Attorneys’ Association.

Inexhaustible Passion

With the dedicated support of colleagues and partners, our firm is increasingly recognized for its experienced professionals in the field of intellectual property. The rapid change and globalization of intellectual property taking place today lead to frequent revisions in harmonization law. Taking this into
account, we dedicate our inexhaustible passion to the following mission: to respond swiftly to these changes and adapt to new realities by offering our clients swift, high-quality service guided by the same spirit and ideals as when our firm was first founded.
Makoto SUHARA

Makoto SUHARA 須原 誠 Patent Attorney

Managing Partner

Technical Specialty Electricity and Electronics
Practice Areas Prosecution of domestic and international patents and industrial designs; Suits against trial decision; Invalidation trials; Technical analysis and advice
Experience and Qualifications After graduating from Tohoku University where he majored in Physics, Mr. Suhara worked in the development department of a manufacturing company. He began working at a patent law firm in 1990 and became a registered attorney in 1993. Mr. Suhara joined us and became a managing partner in 1998.

"Profession"

A patent attorney is more than a “professional”, being a patent attorney is a “profession”. This was the advice given to me by a senior patent attorney at the beginning of my career as a registered attorney. Although I was unfamiliar with the concept of “profession” at the time, I have always remembered these
words. Many things have changed over time, making it difficult for many patent attorneys to remember the meaning of their “profession”. Nonetheless, I remain determined to fulfill my duties as a patent attorney and always remember the true meaning of my “profession”.
Tetsuya IKKAKU

Tetsuya IKKAKU 一角 哲也 Patent Attorney

Junior Partner

Technical Specialty Mechanics
Practice Areas Prosecution of domestic and international patents and industrial designs; Technical analysis and advice
Experience and Qualifications After earning a Master’s degree in Mechanical Engineering from Osaka University, Mr. Ikkaku worked as a water treatment plant engineer with a steel production company.
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.
Risa WAKAMA

Risa WAKAMA 若間 理佐 Patent Attorney


Technical Specialty Chemistry
Practice Areas Prosecution of domestic and international patents and trademarks
Experience and Qualifications Ms. Wakama joined us in 2006 after earning a Master’s degree in Material Science and Engineering from Osaka Prefecture University. She became a registered attorney in 2007.
Miho KAMIOKA

Miho KAMIOKA 上岡 美穂 Patent Attorney


Technical Specialty Mechanics
Practice Areas Prosecution of domestic and international patents and industrial designs
Experience and Qualifications After graduating from Kobe University where she majored in Architecture and Civil Engineering, Ms. Kamioka worked as a landscape designer at a landscape design company. She joined us in 2006 and became a registered attorney in 2007.
Masahiro TSUJI

Masahiro TSUJI 辻 政宏 Patent Attorney


Technical Specialty Mechanics
Practice Areas Prosecution of domestic and international patents and industrial designs; Technical analysis and advice
Experience and Qualifications After earning a Master’s degree in Engineering from Kyoto University, Mr. Tsuji worked in environmental assessment at a construction consultation company. He then worked at an automotive company in crash safety simulation technology development. Mr. Tsuji became a registered attorney in 2010, and joined us in 2013 after working at a competing IP law firm. He was granted the Supplementary Note of Specific Infringement LawsuitCounsel in 2013.
Yoshihiro HOSOI

Yoshihiro HOSOI 細井 義博 Patent Attorney


Technical Specialty Mechanics
Practice Areas Prosecution of domestic and international patents and industrial designs
Experience and Qualifications Prosecution of domestic and international patents and industrial designs
Kazuhiro UCHIDA

Kazuhiro UCHIDA 内田 和宏 Patent Attorney


Technical Specialty Electricity and Electronics
Practice Areas Prosecution of domestic and international patent applications
Experience and Qualifications After earning a Master’s degree in Electrical Engineering from Osaka Prefecture University, Mr. Uchida worked in research and development for an electric appliance manufacturer. He joined us in 2004 and became a registered attorney in 2012.
Masaki SAITO

Masaki SAITO 斉藤 正樹 Patent Attorney


Technical Specialty Mechanics
Practice Areas Prosecution of domestic and international patents and industrial designs
Experience and Qualifications After graduating from the Department of applied physics, Graduate School of Engineering/Faculty of Engineering, in the University of Tokyo, Mr. Saito as an engineer had engaged with development LCD technologies in an Electronic appliance company. He joined us in 2016, and became a registered attorney in the same year.
Kunito KITAMURA

Kunito KITAMURA 北村 邦人 Patent Attorney


Technical Specialty Mechanics
Practice Areas Prosecution of domestic and international patents and industrial designs
Experience and Qualifications After graduating from the Graduate School of Engineering in Kobe University, Mr. Kitamura started his career in a Japanese manufacturing company, after which he worked in an IP law firm where he was engaged with prosecuting patent and design applications. In 2015, he joined us, and became a registered attorney in the same year. His main duty includes drafting applications of mechanic and control fields, handling office actions and outbound cases for these cases. He is also a licensed Aeronautical Service Special Radio Operator.

Tokyo Office

Rumi ICHIKAWA

Rumi ICHIKAWA 市川 ルミ Patent Attorney

the Head of Tokyo Office

Technical Specialty Electricity and Electronics
Practice Areas Prosecution of domestic and international patents and industrial designs; Suits against trial decision; Technical analysis and advice; Copyright consultation
Experience and Qualifications After graduating from Waseda University where she majored in Electrical Engineering, Ms. Ichikawa worked as a consultant for a foreign computer company and business consulting company. She became a registered attorney in 2001, joined us in 2002 and opened our Tokyo Office the same year. Ms. Ichikawa has been a temporary committee member of JPO industrial property council from 2015 to 2016, an executive director of the Japanese Patent Attorney Association from 2016, etc.
Kinuyo ARASHI

Kinuyo ARASHI 嵐 絹代 Patent Attorney

Tokyo Office

Technical Specialty Mechanics
Practice Areas Prosecution of domestic and international patents and industrial designs
Experience and Qualifications After earning a Master’s degree in Construction Engineering from Kobe University, Ms. Arashi
studied abroad and participated in an internship program. She joined us in 2001 and became a
registered attorney in 2009. In 2001, Ms. Arashi received her grade pre-1 Japanese English proficiency
certification from “STEP” (“Eiken”).

Sapporo Office

Takahiko TOMITA

Takahiko TOMITA 富田 尊彦 Patent Attorney

the Head of Sapporo Tomita Office

Technical Specialty Electricity and Electronics
Practice Areas Prosecution of domestic and international patents, industrial designs, and trademarks; Seminars and consultation on intellectual property; Technical analysis and advice
Experience and Qualifications Mr. Tomita joined us in 2004 after earning a Master’s degree in Physics from Hokkaido University and became a registered attorney in 2007. That same year, he opened our Sapporo Tomita office in Hokkaido. Mr. Tomita has been a vicechairman 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 Prosecution of domestic and international patents and trademarks
Experience and Qualifications After earning her Master’s degree in Agriculture from Hokkaido University, Ms. Fujikawa worked at a municipality. She became a registered attorney in 2013, and joined us in the same year.

Kazufumi KIMURA

Kazufumi KIMURA 木村 和史

Advisor

Technical Specialty Mechanics, Electricity and Electronics, Gaming Machines
Practice Areas Prosecution of domestic and international patents
Experience and Qualifications After graduating from Doshisha University Faculty of Science and Engineering, Mr. Kimura started to work at an R & D department of a manufacturer in 1988. He joined Kaji, Suhara & Associates in 1994, and has worked on patent prosecution for over 30 years.
金 龍柱Yong Ju KIM

金 龍柱Yong Ju KIM 金 龍柱

Korean Patent Attorney: Advisor

Experience and Qualifications After graduating from Konkuk University in South Korea where he majored in Electric Engineering, Mr. Kim came to Japan to study electronic engineering at Kobe University. After earning his doctorate, also at Kobe University, he worked as a researcher at Samsung’s Production Technology Center. Mr. Kim also has experience as an examiner at the Korea Patent Office, 4th Examination Bureau, Electronics Department, and received a prize from the Power & Electronics Association of Korea in 2002. Mr. Kim currently runs an IP law firm in South Korea.