From 1997, the World cup in weight categories has been organized by IKO1 led by
Shokei Matsui. • 1st World cup in weight categories IKO1 (1997, Osaka, Japan) • 2nd World cup in weight categories IKO1 (10 June 2001, Osaka, Japan) • 3rd World cup in weight categories IKO1 (1 May 2005, Tokyo, Japan) • 4th World cup in weight categories IKO1 (23 August 2009, Tokyo-Chiba, Japan) • 5th World cup in weight categories IKO1 (28 April 2013, Tokyo, Japan) • 6th World cup in weight categories IKO1 (16 April 2017, Tokyo, Japan) • 7th World cup in weight categories IKO1 (29 April 2025, Tokyo, Japan)
Super Heavyweight (+90 kg) Heavyweight (-90 kg) Middleweight (-80 kg) Lightweight (-70 kg) == WKO (Shinkyokushinkai) ==