He spent two years working for WWE, as well as for its development brands, Florida Championship Wrestling (FCW) and NXT.

[3][1] After his release from WWE, he returned to Japan working as a freelancer for Kaientai Dojo (K-Dojo), Pro Wrestling Zero1 (Zero1) and Wrestle-1 (W-1), the latter of which he signed for in 2015.

[5] In 2005, under the guidance of former Far East Connection manager, 296, Kazma formed a stable along with Kengo Mashimo called Kinnoutou and started to dominate, eventually taking on Ryota Chikuzen and Kunio Toshima as well.

[5] In the beginning of 2007, Kazma began teaming up with Michinoku and together participated in Strongest-K Tag League 2007 and reached the finals before they were eliminated by Makoto Oishi and Shiori Asahi.

[6] On 4 September 2007, Kazma and Chikuzen defeated Miyawaki and Naoki Tanizaki to become the Strongest-K Tag Team Champions and held the titles for about a month before losing them to Mashimo and Madoka.

[8] With this loss Kazma teamed up with Yuji Hino to take part in the same tournament and reached the final before being eliminated by Mashimo and Madoka.

Sakamoto made his FCW debut on 4 December 2011 alongside fellow K-Dojo alum Jiro in a loss against the team of Big E Langston and Nick Rogers.

[10] Sakamoto went on to lose every televised FCW match he participated in, including defeats to Dean Ambrose and Mike Dalton.

[14][15] From June, with Tensai losing more frequently, he would often vent his frustrations by abusing and attacking Sakamoto, who would remain loyal to his master.

[2] On 15 July, Sakamoto wrestled his first match since his WWE release, when he defeated Tank Nagai at a Kaientai Dojo event.

[27] Sakamoto finished his Fire Festival on 4 August with a record of two wins, one draw and two losses, failing to advance to the finals of the tournament.

[30] Back in Kaientai Dojo the following day, Sakamoto and Kengo Mashimo defeated Daigoro Kashiwa and Ricky Fuji to win the Strongest-K Tag Team Championship.

[35] On 30 January 2015, Sakamoto received his first title shot in Wrestle-1, when he and Desperado's newest member Koji Doi unsuccessfully challenged Kaz Hayashi and Shuji Kondo for the Wrestle-1 Tag Team Championship.

[39] On 3 November, Sakamoto, Koji Doi and Nosawa Rongai defeated Jackets (Jiro Kuroshio, Seiki Yoshioka and Yasufumi Nakanoue) for the UWA World Trios Championship.

[41] On 6 March 2016, Sakamoto and Real Desperado's newest member Yuji Hino defeated Masayuki Kono and Shuji Kondo for the Wrestle-1 Tag Team Championship.