Seiki Yoshioka

In 2013, there was a mass exodus from All Japan Pro-Wrestling after issues with its new ownership, and Yoshioka was one of the many that joined Keiji Muto's new promotion, Wrestle-1 (W-1), He left AJPW on June 30 and transferred to W-1 on July 10.

[12][2] On March 2, he and Manabu Soya defeated Ryoji Sai & Kazma Sakamoto in Ryōgoku Kokugikan in an event co-promoted by partner company Total Nonstop Action (TNA).

[12] On June 22, Yoshioka defeated Jiro 'Ikemen' Kuroshio, then won another battle royal for a title opportunity, this time for All Star Wrestling (ASW)'s British Light Heavyweight Championship.

They won the UWA World Trios Championship from New Wild Order (Akira, Jun Kasai & Kumagoro) on October 9, 2015, at Wrestle-1 Tour 2015 Fan Appreciation Day in Korakuen Hall.

[17] A month later, they lost those titles to Real Desperado (Kazma Sakamoto, Nosawa Rongai & Koji Doi), although they won them straight back less than 30 days later at Wrestle-1 2015 Tour Autumn Bout.

[17] On January 7, Jackets would vacate their UWA World Trios belts after Yoshioka couldn't make their next scheduled defence due to cecum surgery.

[17] In July, Yoshioka would team up with Andy Wu & Daiki Inaba to win the UWA World Trios titles back from Hayashi, Tanaka & Tajiri at Wrestle-1 Tour 2016 Symbol in Shinjuku Face.

[17] Yoshioka would defeat teammate Andy Wu in a Cruiserweight Championship #1 contender's match, and on September 18, challenged Yusuke Kodama in a losing effort.

[17] Yoshioka, Wu & Inaba made a second successful defence, defending the UWA World Trios belts against Koji Doi, Yusuke Kodama & Kumagoro.

On December 9 at Wrestle-1 Tour 2016 Shining Winter, the unit of Yoshioka, Inaba, Yusuke Kodama, Koji Doi, Kumagoro & Andy Wu was named Newera.

Yoshioka then made regaining the championship his goal, eventually winning it back on September 2 at 2017 Pro-Wrestling Love in Yokohama after an SK kick.

[17] Newera's Yoshioka, Daiki Inaba & Jiro 'Ikemen' Kuroshio unsuccessfully challenged for the UWA World Trios Titles against Koji Doi, Takanori Ito & Kumagoro in January 2018.

This was revealed on the November 23 show Wrestle-1 Tour 2018 Autumn Bout in Korakuen Hall to be Yoshioka, who interfered in a tag team match with Alejandro's mask, provoking Kaz Hayashi & Pegaso Iluminal.

[17] As part of #Stronghearts, Yoshioka had more freedom to perform for other promotions, returning to AJPW for their Junior Battle of Glory 2019 and making appearances for DDT.

On March 10, he defeated El Hijo de Pantera with his new technique, the Crush Driver to win the 2019 Cruiser Fes, although the injuries sustained in the match meant he had to miss 3 months and couldn't capitalize on his momentum.

[17] On March 25, Newera made a reunion to farewell Wrestle-1 as Yoshioka, Daiki Inaba & Andy Wu fought the former Allied Powers, Kaz Hayashi, Shuji Kondo & Masayuki Kono to a 30-minute time limit draw in that show's main event.

[17] At Wrestle-1's last show to date, Yoshioka teamed with Cima & Issei Onitsuka of #Stronghearts in a losing effort against Andy Wu, Jun Tonsho & El Hijo del Pantera.

[20] On February 21, 2018, Yoshioka teamed with Jun Tonsho & Minoru Tanaka in a losing effort against Ratel's (Hayata & Yo-Hey) & Yuya Susumu.

On April 18, Yoshioka appeared at Pro Wrestling Noah, as the newest member of Takashi Sugiura's Sugiura-gun after being recruited by Nosawa Rongai.

[22] On May 5, Sugiura-gun faced off against Kongo, in which Yoshioka faced Haoh in a losing effort, and Yoshioka, teaming with Sugiura-gun (Takashi Sugiura, Kazushi Sakuraba, René Duprée, Hajime Ohara & Nosawa Rongai) lost to Kongo (Kenoh, Masa Kitamiya, Manabu Soya, Yoshiki Inamura, Nioh & Haoh) in an Elimination Match.

[28] On February 12, 2021, at Destination 2021 ~Back To Budokan~ in the Nippon Budokan, Yoshioka defeated GHC Junior Heavyweight Champion Daisuke Harada in just over 10 minutes to win the belt for the first time.

[30] On May 2, Yoshioka attacked tag partner Yo-Hey, betraying Full Throttle and joined Stinger with Yoshinari Ogawa & Wrestle Gate alumni Hayata & Yuya Susumu.

[32] Yo-Hey joined Nosawa Rongai's new unit, Los Perros del Mal de Japon, and Yoshioka met him at Muta the World on June 27, where Yoshioka teamed with Stinger mates Ogawa & Susumu to take on Los Perros del Mal de Japón's Yo-Hey, Nosawa & Dragon Gate's Eita.

[35] The reunion of Scramble☆Time (Yoshioka & Susumu) defeated Harada & Ohara at Cross Over 2021 in Hiroshima to each win the GHC Junior Heavyweight Tag Team Championship for the first time each.