Experienced Professionals Who Know How to Listen


Our Approach

Our second is to do this while attending to your special needs and desires as only a small, close-knit office like ours is capable.

SHIMADA & PARTNERS is a small firm and proud of it. Being small means we can respond quicker and produce accurate results. And best of all, it helps us to bond stronger and more lasting partnerships with our clients.

Our forte is trademarks and service marks. We pride ourselves in having been a prime mover in establishing a Japanese trademark culture that treats international marks on a par with local ones.


Our Attorneys

Patent Attorney

Yoshikatsu Shimada

  • January, 1980
    Established Shimada Patent Office
  • October, 1978
    Licensed as Patent Attorney
  • February, 1961
    Employed by Karami Patent Office and over the years acquired extensive experience in all areas of domestic and international intellectual property protection, including patent, utility model, design and trademark applications, and Japan Patent Office trial procedures.
  • April, 1959
    Employed by Institute for Solid State Physics, University of Tokyo
  • March, 1959
    Graduated from Law Department of Chuo University
  • March, 1955
    Graduated from Kawasaki Prefectural High School
Making cosmos bloom at the Tamagawa riverside.
Listening to music.

Patent Attorney

Yukio Kouchi

  • April, 2014
    Licensed as Patent Attorney
  • January, 2002
    Licensed as Administrative Scrivener
  • January, 1981
    Joined Shimada Patent Office
  • March, 1977
    Graduated from Law Department of Waseda University
Watching rugby football and other sports.
City Marathon.
Japanese Chess.
Takarazuka Revue.

Patent Attorney

Soichiro Senuma

  • December, 2020
    Participated in Shimada & Partners
  • April, 2014
    Employed by SUGIMURA & Partners
  • October, 2013
    Employed by Pillsbury Winthrop Shaw Pittman LLP
  • April, 2004
    Employed by Nishiura & Associates
  • March, 2003
    Graduated from Engineering Department of Tokyo University of Science
Exercise and travel.




1011 Hosokawa Bldg. 1-17 Akasaka 1-chome Minato-ku, Tokyo


TEL 03-3584-4300

SHIMADA & PARTNERS is conveniently located and easy to find—just a short walk from the Japan Patent Office. Our office is located in the Hosokawa Bldg. Suite 1011.

If coming by taxi, show the directions for your driver.

If coming by subway, our office is within walking distance of several subway stations.

  • Tokyo Metro Ginza or Nanboku Subway Line
    Station: Tameike-Sannou
    Take exit staircase No. 9
  • Tokyo Metro Ginza or Nanboku Subway Line
    Station: Tameike-Sannou
    Take exit staircase No. 8
  • Tokyo Metro Chiyoda Subway Line
    Station: Kokkai-Gijidomae
    Take exit staircase No. 8
  • Marunouchi Subway Line
    Station: Kokkai-Gijidomae
    Take exit staircase No. 3