[6] At W-1 Wrestle-1 Tour 2019 Trans Magic from March 2, he teamed up with Manabu Soya, Seigo Tachibana and Jiro Kuroshio to defeat Andy Wu, Daiki Inaba, Kaz Hayashi and Pegaso Iluminar.

[7] At Freedoms/2AW VersuS from June 27, 2021, Kaji teamed up with Shu Asakawa and Toll Glänz (Ayato Yoshida and Tank Nagai) to defeat Daisuke Masaoka, Tomoya Hirata, Toru Sugiura and Yuya Susumu.

[10] After six years, he returned for various of the promotion's signature events such as at the AJPW Junior League, making his first appearance at the 2014 edition where he competed in the Block A, scoring a total of two points after going against Kotaro Suzuki, Atsushi Aoki, Último Dragón and Ryuji Hijikata.

[12] On the sixth night of the 2014 Super Power Series from May 25, Kaji participated in a six-man battle royal for the Ironman Heavymetalweight Championship won by Masao Inoue and also involving Jun Akiyama, Menso-re Oyaji, Sushi and Zeus.

[17] At the 2022 edition of the Ultimate Tag League, at a show from February 20, Kaji teamed up with Yuji Hino and Yukio Naya in a losing effort against Burning (Jun Akiyama, Tetsuya Endo and Yusuke Okada).