[6] Due to one of Pro Wrestling Wave's business partnerships, Nagahama competed at a house show promoted by Marvelous That's Women Pro Wrestling on February 24, 2020, where she teamed up with Nagisa Nozaki, Sakura Hirota, Yuki Miyazaki and Yumi Ohka as "Team Wave" and went into a time-limit draw against Tem Marvelous (Hibiki, Kaoru, Mikoto Shindo, Takumi Iroha and Tomoko Watanabe).
Some of the most notable were Nagahama herself alongside Miku Aono, Banny Oikawa, Rina Shingaki, Ken Ohka, Manami Toyota, Risa Sera, Hiragi Kurumi, Syuri, Tae Honma, and many others.
[9] She took part into the 2nd Kizuna Tournament of August 29, 2020, event in which she teamed up with Tsukasa Fujimoto and defeated Rina Yamashita and Satsuki Totoro in the first rounds but fell short to Maya Yukihi and Suzu Suzuki in the semifinals.
[13] One year later she appeared for the first time in the big tournament, placing herself in the "Italian Red" block in which she scored a total of three points after going against Sareee, Yumi Ohka and Mayumi Ozaki.
[16] At the 2018 edition she fought in the "Violence" block where she scored a total of five points after going against Ayako Hamada, Arisa Nakajima, Misaki Ohata, Mio Momono and Hikaru Shida.
[21] She wrestled her last match at an event promoted specially for her farewell, the WAVE HIRO'e Retirement Last Longbeach on September 18, 2020, where she teamed up with Nagisa Nozaki to defeat Kaori Yoneyama and Miyuki Takase.