All Japan Jiu Jitsu Championship Pre Koshien - Koshien 2023 Male White Junior Teen Light Feather 4 Mins ~37.6kg 8 1 / 1 Division Max Weight Time Competitors Brackets Final Semifinal JPN Kurokawa Sohei Paraestra Tb JPN Imazeki Jo Bushokan Dojo Fight 61 Mat 2 15 Jul 13:26PM Chiang Yu-chun Hsinchu B J J Satake Tomosu Mach Dojo TAI JPN Fight 63 Mat 2 15 Jul 13:36PM JPN Yamaguchi Ruka Crowforest JPN Nagaoka Yuuto Sora Bjj Fight 62 Mat 2 15 Jul 13:31PM Narita Jo Strapple Ohana Minoshima Koshiro X-treme Ebina JPN JPN Fight 64 Mat 2 15 Jul 13:41PM Fight 66 Mat 2 15 Jul 13:51PM Fight 67 Mat 2 15 Jul 13:56PM Fight 70 Mat 2 15 Jul 14:11PM