ZERO-ONE Happy New Year 2015 was a professional wrestling event produced by Pro Wrestling ZERO1, that took place on January 1, 2015 in Korakuen Hall in Tokyo, Japan. It was broadcast on Samurai! TV on January 15, 2015.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Yoshikazu Yokoyama defeated Kazuki Hashimoto (6:51)
- Jason Lee (c) defeated Atsushi Maruyama and Mineo Fujita (9:52) in a ZERO1 World Junior Heavyweight Championship/ZERO1 International Junior Heavyweight Championship Match
- Dangan Yankees (Fujita Hayato, Ikuto Hidaka, Isami Kodaka & Yuko Miyamoto) defeated Daemon-gun (Daemon Ueda & KAMIKAZE), Kengo & VM Mask #15 (11:44)
- Atsushi Onita, Dump Matsumoto & Ichiro Yaguchi defeated Voodoo Murders (TARU & YASSHI) & Voodoo Mask (11:49)
- Hideki Suzuki, Kohei Sato, Masato Tanaka, Shinjiro Otani & Yusaku Obata defeated Akebono, Daisuke Sekimoto, Ryouji Sai, Takashi Sugiura & Yoshihiro Takayama
- Shinjiro Otani defeated Yoshihiro Takayama (10:39)
- Daisuke Sekimoto defeated Shinjiro Otani (4:38)
- Daisuke Sekimoto defeated Yusaku Obata (5:41)
- Hideki Suzuki defeated Daisuke Sekimoto (6:28)
- Akebono defeated Hideki Suzuki(4:01)
- Masato Tanaka defeated Akebono (3:49)
- Masato Tanaka vs. Takashi Sugiura - Time Limit Draw (15:00)
- Kohei Sato defeated Ryouji Sai (7:46)