Sensei Shihan Ishikawa holds a 8th Dan black belt in Shitoryu karate (WKF certified) and has practised the art for over 40 years, starting at the age of 17 in Osaka, Japan. Under the invitation of the Singapore Karate-Do Association (SKA) at that time, Shihan Ishikawa was recommended by Kenzo Mabuni (younger brother of Kenei Mabuni), to be the Chief Instructor of SKA in Singapore. Shihan Ishikawa was then 25 years old when he came to Singapore in December 1968. Till today, Shihan Ishikawa still teaches karate in Singapore.

Shihan Ishikawa, with over 40 years of experience and knowledge, is highly sought after for his expertise. He was recently appointed to be Hong Kong’s performance coach for its preparation to the ASIAN Games 2002 held in Busan, Korea. Prior to this appointment, Shihan Ishikawa was also Singapore's national coach for the recent 21st SEA games held in Kuala Lumpur, Malaysia (2001). He was also appointed the Singapore's National Head Coach for Karate for the following events: (2001) Hong Kong Invitational Tournament 2001 (1999) 4th AUKO Karate Championships - Singapore (1999) 20th Sea Games - Brunei (1997) 19th SEA Games - Indonesia, Jarkata (1997) 2nd Ladies International Karate Cup - Tokyo, Japan (1994) 12th ASIAN Games - Hiroshima, Japan (1994) 5th World Women's Cup - Fukuoka, Japan (1993) 1st A.U.K.O Tournament - Taipei, Taiwan (1993) 4th World Women's Cup - Fukuoka, Japan (1993) 17th SEA Games - Singapore (1991) 16th SEA Games - Manila, Philippines (1972) 2nd World Karate Championships - Paris, France Shihan Ishikawa is also one out of a handful of Karate exponents in South East Asia who qualifies as a referee and judge for competition free sparring (shiai kumite) and judge for kata for International Tournaments. His qualification includes: AKF Kata Judge A AKF Kumite Referee A Shihan Ishikawa founded the Ken Yu Kai Karate Association (Member of the Singapore Karate-Do Federation) in 19 September 1991 to promote the art of karate in Singapore. He holds the appointment of Chief Instructor of the association. Shihan Ishikawa is also the Chief Instructor of the National University of Singapore Karate Sub-Club, the Nanyang Technological University Karate Club, and the Japanese Association of Singapore.