However, in 1988, at the age of 41, Nobukawa withdrawn membership from various reasons. At the same time of his withdrawal, Tani ha Shitoryu Seiku kai, Inami Branch was certified by Tani ha Shitoryu Syukou kai as direct control branch. Then, Nobukawa renamed his association as Tani ha Shitoryu kai Syukou kai “Renshi kan”, which implies “develop one’s skill with ambition”. Later, the number of Branch Dojo and pupils in Renshi kan has increased. Renshi kan produces a lot of famous players: some of them become representative for National Sports Festival and All Japan Championship and others participate World Championship.
For 5 years starting from 1993, Nobukawa learned Karate do under the Master Hayashi Teruo, who is the world famous Souke of Japan Karatedo Hayashi ha Shitoryu kai. In January of 1998, great teacher Tani Chojiro Souke passed away. Syuko kai was divided into two groups: Tani ha Karate do Syuko kai (2nd Souke Master Tani Chojiro-real name:Hiroshi, son of 1st Souke Tani Chojiro) and Shitoryu kai Syuko kai Union (President: Master Yamada Haruyoshi). We, Renshi kan, belonged to Shitoryu Syuko kai Union which was approved by the resolution in Ex-Syuko kai general assembly. We were the central in newly-born Syuko kai Union. From the beginning of Shuko kai Union, Nobukawa served the union as vice executive president.In November of 2000, Nobukawa was qualified as 8th Dan Hanshi by Shitoryu Syukou kai Union with appreciation for his exceptional skills. In 2001, we had planed to proclaim us Japan Karate do Nobukawa ha Shitoryu Syuko kai, however, we withdrawn from Shitoryu Syuko kai Union in June 2000. We were reformed as Japan Karate do Nobukawa ha Shitoryu kai and has been hitherto existing.

Hanshi Kuniaki Nobukawa is currently ranks Ranks Hachi Dan (8th Dan Blackbelt) and Nana Dan (7th Dan Blackbelt) from JKF. He is the founder and Souke of Japan Karate-Do Nobukawa-Ha Shito-Ryu Kai. He also hold Japan Karate-Do Federation National Kumite and Kata Referee as well qualification in Asian Karate-Do Federation.
He also hold the following prestigious designations like Council of Hyogo Prefecture Karate-Do Association, Chairperson of Akashi City Karate do Association, Executive Board Member of Akashi City Amateur Sports Association, Shihan for Karate do Club at Akashi National College of Technology, Shihan for Karate do Club at Kobe Daiichi High School.

Now Japan Karate-Do Nobukawa-Ha Shito-Ryu Kai is also assisted with members of Shihan including Nobukawa Yoshiaki Sensei (WKF Referee) and Nobukawa Takahiro (JKF Official Referee).