# 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.

## Title history
### Reigns

Key :
| No. | Overall reign number |
| Reign | Reign number for the specific champion |
| Days | Number of days held |
| Defenses | Number of successful defenses |
| <1 | Reign lasted less than a day |
| + | Current reign is changing daily |
| No. | Champion | Championship change | Championship change | Championship change | Reign statistics | Reign statistics | Reign statistics | Notes | Ref. |
| No. | Champion | Date | Event | Location | Reign | Days | Defenses | Notes | Ref. |
| 1 | Hi69 | July 3, 2004 | House show | Odaiba, Japan | 1 | 70 | 1 | Hi69 defeated Kengo Mashimo in the finals of a 16-man tournament to become the inaugural champion. | |
| 2 | Kaz Hayashi | September 11, 2004 | K-DOJO Club-K Super Downtown | Tokyo, Japan | 1 | 121 | 2 | This was also for Hayashi's AJPW Junior Heavyweight Championship. | |
| 3 | Taka Michinoku | January 10, 2005 | K-DOJO Club-K Super Kick | Tokyo, Japan | 1 | 361 | 8 | This was also for the World Junior Heavyweight Championship. | |
| 4 | Joe | January 6, 2006 | K-DOJO Club-K Super Kick | Tokyo, Japan | 1 | 276 | 3 | | |
| 5 | Kengo Mashimo | October 9, 2006 | House show | Tokyo, Japan | 1 | 552 | 5 | | |
| 6 | Yuji Hino | April 13, 2008 | K-DOJO Club-K Super Ev. 7 | Tokyo, Japan | 1 | 118 | 2 | | |
| 7 | Kengo Mashimo | August 9, 2008 | K-DOJO Super Big Show Chiba Hakkenden | Chiba, Japan | 2 | 246 | 2 | | |
| 8 | Taka Michinoku | April 12, 2009 | K-DOJO Club-K Super Ev. 7 | Chiba, Japan | 2 | 189 | 4 | | |
| 9 | Kazma | October 18, 2009 | K-DOJO Club-K Super Outbreak 2009 | Chiba, Japan | 1 | 301 | 5 | | |
| 10 | Yuji Hino | August 15, 2010 | K-DOJO Super Big Show Chiba Hakkenden | Chiba, Japan | 2 | 307 | 4 | | |
| 11 | Kengo Mashimo | June 18, 2011 | K-DOJO Club-K Super Take | Chiba, Japan | 3 | 431 | 10 | | |
| 12 | Daisuke Sekimoto | August 22, 2012 | K-Dojo Club-K Super In Shinjuku FACE | Chiba, Japan | 1 | 83 | 3 | | |
| 13 | Yuji Hino | November 13, 2012 | K-DOJO Club-K Super In Korakuen 2012 | Chiba, Japan | 3 | 152 | 1 | | |
| 14 | Taishi Takizawa | April 14, 2013 | K-DOJO CLUB-K SUPER Evolution 11 ~ K-DOJO 11th Anniversary | Chiba, Japan | 1 | 79 | 0 | | |
| — | Vacated | July 2, 2013 | — | Chiba, Japan | — | — | — | The title was vacated after Takizawa was arrested for voyeurism. | |
| 15 | Kengo Mashimo | September 1, 2013 | K-DOJO Sea King Tournament | Chiba, Japan | 4 | 224 | 4 | Mashimo defeated Ryuichi Sekine in the finals of the 2013 Sea King Tournament to win the vacant title. | |
| 16 | Saburo Inematsu | April 13, 2014 | K-DOJO 12th Anniversary Show ~ CLUB-K SUPER Evolution 12 | Tokyo, Japan | 1 | 70 | 1 | | |
| 17 | Miyawaki | June 22, 2014 | K-DOJO Club-K Super In Osaka | Osaka, Japan | 1 | 63 | 1 | Won by referee stoppage after Inematsu dislocated his left shoulder. Initially Miyawaki refused the title, but was officially recognized as the champion on June 25. | |
| 18 | Kengo Mashimo | August 24, 2014 | K-DOJO Club-K Super In TKP | Chiba, Japan | 5 | 231 | 8 | | |
| 19 | Yuji Hino | April 12, 2015 | K-DOJO Club-K Super Evolution 13 | Tokyo, Japan | 4 | 147 | 2 | | |
| 20 | Tank Nagai | September 6, 2015 | K-DOJO Club-K Super In TKP | Chiba, Japan | 1 | 329 | 6 | | |
| 21 | Kaji Tomato | July 31, 2016 | K-DOJO Club-K Super In TKP Garden City Chiba | Chiba, Japan | 1 | 20 | 0 | | |
| 22 | Kengo Mashimo | August 20, 2016 | K-DOJO Club-K Super In Blue Field | Chiba, Japan | 6 | 281 | 5 | | |
| 23 | Isami Kodaka | May 28, 2017 | K-DOJO Tokyo Big Show | Tokyo, Japan | 1 | 113 | 2 | | |
| 24 | Tank Nagai | September 18, 2017 | K-DOJO Tokyo Big Show | Tokyo, Japan | 2 | 27 | 0 | | |
| 25 | Taishi Takizawa | October 15, 2017 | K-DOJO Tokyo Big Show | Tokyo, Japan | 2 | 455 | 6 | | |
| 26 | Shu Asakawa | January 13, 2019 | K-DOJO GRAND SLAM In Korakuen Hall | Tokyo, Japan | 1 | 90 | 2 | | |
| 27 | Ayato Yoshida | April 13, 2019 | K-DOJO 17th Anniversary GRAND SLAM In Korakuen Hall | Tokyo, Japan | 1 | 43 | 0 | | |
| — | Deactivated | May 26, 2019 | — | — | — | — | — | The title was deactivated due to Kaientai Dojo rebranding as Active Advance Pro Wrestling. The title was replaced by the 2AW Openweight Championship. | |

## Combined reigns

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