Closed Guard Strategy for Standing Opponent by Hakuto Yamamoto

Collar Sleeve Guard and Omoplata by Tomoyuki Hashimoto

Heel Hook Encyclopedia by Yuki Takahashi

K-Guard & Heel Hook Seminar by Toshiyasu Sagae

Guard Retention Encyclopedia vol.2 by Tomoyuki Hashimoto

De La Riva University by Tomoyuki Hashimoto

The Complete Spider Guard vol.1 by Kazuki Watanabe

De La Rive Laboratory by Tomoyuki Hashimoto

Fundamental Leg Lock Drills by Yuki Takahashi

The Complete Spider Guard vol.2 by Kazuki Watanabe

ガードリテンションシステム：ベーシック｜グスタボ・オガワ