Strongest-K Championship

The Strongest-K Championship was the top singles title in Kaientai Dojo and was established in 2004. The holder of the title was referred to as the "Champion of Strongest-K". There have been a total of 27 reigns and one vacancy shared between 16 different champions. The final title holder was Ayato Yoshida.

Combined reigns
July 29, 2024. {| class="wikitable sortable" style="text-align: center" !Rank !Wrestler !No. of reigns !Combined defenses !Combined days !1 !2 !3 !4 !5 !6 !7 !8 !9 !10 !11 !rowspan=2|12 !14 !15 !16
 * Kengo Mashimo || 6 || 34 || 1,965
 * Yuji Hino || 4 || 9 || 724
 * Taka Michinoku || 2 || 12 || 549
 * Taishi Takizawa || 2 || 6 || 534
 * Tank Nagai || 2 || 6 || 356
 * Kazma || 1 || 5 || 301
 * Joe || 1 || 3 || 276
 * Kaz Hayashi || 1 || 2 || 121
 * Isami Kodaka || 1 || 2 || 113
 * Daisuke Sekimoto || 1 || 3 || 83
 * Shu Asakawa || 1 || 2 || 90
 * Hi69 || 1 || 1 || 70
 * Saburo Inematsu || 1 || 1 || 70
 * Saburo Inematsu || 1 || 1 || 70
 * Miyawaki || 1 || 1 || 63
 * Ayato Yoshida || 1 || 0 || 43
 * Kaji Tomato || 1 || 0 || 20