WRESTLE-1-ZERO1 KASSEN ~ Battle ZERO1 vs W-1 Tournament 2015 - Night 1 was a professional wrestling event produced by Pro Wrestling ZERO1, that took place on March 12, 2015 in Shinjuku FACE in Tokyo. It was broadcast on March 22, 2015 on Samurai! TV.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Team 246 (Kaz Hayashi & Shuji Kondo), Andy Wu, Minoru Tanaka & Seiki Yoshioka defeat Ikuto Hidaka, Jason Lee, Mineo Fujita, Takuya Sugawara & YASSHI (11:13)
- Yoshikazu Yokoyama defeats Shotaro Ashino (7:42)
- Daemon Ueda defeats Kumagoro (6:45)
- KAI & Yasufumi Nakanoue defeat KAMIKAZE & Kengo (10:36)
- Masato Tanaka defeats Manabu Soya (13:17)
- Daiki Inaba & Masakatsu Funaki defeat Shinjiro Otani & Yusaku Obata (17:52)
- Hideki Suzuki & Kohei Sato defeat Desperado (Masayuki Kono & Ryouji Sai) (18:25)