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kenji Ushiro Offisial Site

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Kenji Ushiro


Soshinkan Karatedo, 9th Dan, Hanshi

All Japan Kendo Federation Iai, Musojikiden Eishinryu, 7th Dan

Ushiro HQ Dojo, SoshinKan, Kancho


1986 – Head of the Technical Research Center at Yoshimura Electric Company, Ltd.

1991 – Director of the Technical Research Center at Yoshimura Electric Company, Ltd.

1996 – Chief Executive of Tokei Denko Company,

Ltd. 1997 – Chief Executive of Kaga Components Company, Ltd.

2008 – CEO of Jissenjuku Company, Ltd.


Kenji Ushiro was born on January 15, 1949 in Kobayashi city, Miyazaki, prefecture.


In 1967, he entered Miyazaki University and joined the karate team.

He was the youngest entrant in the Second Annual National Karatedo Tournament.

He began direct training under Nikichi Zaha, master of Shindokai, after graduating from Miyazaki University.


In 1982, he was admitted to the All Japan Kendo Federation Iaido (Zen Nippon Kendo Renmei Iaido) and won over 50 championships in various tournaments.

He has been involved in the development of new technology for numerous electronic devices ranging from video equipment to satellite cell phones and has been granted many patents. He has also been a successful manager in the business world both domestically and internationally. All the while, he devoted himself to intense martial arts training and led a life of bunbu ryodo (unification of literary and martial arts).


He teaches actively in his own schools, Ushiro Karate Jissenjuku and Ushiro Dojuku, as well as at non-martial arts organizations including corporations, professional and amateur sports schools, high school baseball teams, among others.

He has expanded his practices and teaching overseas to the United States, Germany, Hungary, Italy, and Poland and has gained respect from the martial arts community all over the world.

Patent as developper


1.  Patent publication 2003-274657 Switching Power Supply

2.  Patent publication 2003-250191 Piezoelectric Speaker Power Regular

3.  Patent publication 2003-111303 Solar Power Supply

4.  Patent publication 2002-315316 Solar Power Supply

5.  Patent publication 2002-238182 Solar Power Supply

6.  Patent publication 2002-191167 Harmonic Current Control Circuit

7.  Patent publication 2002-136126 RCC Switching Power Supply

8.  Patent publication 2002-136117 Switching Power Supply

9.  Patent publication 2002- 101566 Battery Charger

10.  Patent publication 2001-314078 Switching Power Supply

11.  Patent publication 1999-329562 Prong Mechanism on Plugs

12.  Patent publication 1998-329562 Switching Power Supply

13.  Patent publication 1995-302721 Power Transformer

14.  Patent publication 1995-297053 Transformer & Electronic Device with Transformer

15.  Patent publication 1995-249434 Rechargeable Battery

16.  Patent publication 1995-143412 Remote Playback Device

17.  Patent publication 1995-115024 Power Transformer

18.  Patent publication 1993-205783 Secondary Battery Installation  Device

19.  Patent publication 1993-056567 Electronic Charge Level Display

20.  Patent publication 1993-042257 Weighted Walking Training  Brace

21.  Patent publication 1993-015079 Secondary Battery with EPMS

22.  Patent publication 1993-013108 Secondary Battery

The drawings of the relay and its design specifications that he designed in his second year, at 27 years old (hand-drawn, before CAD was available)

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About this site:

This site is managed by UK Jissenjuku and Ushiro Dojuku. All practical method and program introduced here are intellectual properties of Kenji Ushiro’s UK Jissenjuku. The use of the  methods are only permitted for personal use and any form of demonstrations and lectures in public without authorization are prohibited.

In case of public usage, please request us to assign certified instructors, or take our courses to become certified.

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