NJPW Fighting Spirit Unleashed Boston was a professional wrestling event promoted by New Japan Pro-Wrestling (NJPW) that took place on September 27, 2019 in Lowell, Massachusetts at the Lowell Memorial Auditorium.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Karl Fredericks defeated Alex Coughlin (8:47)
- Lance Archer defeated Ren Narita (7:23)
- Juice Robinson & Mikey Nicholls defeated Clark Connors & TJP (8:04)
- BULLET CLUB (Chase Owens & Jado) defeated The Rock 'n' Roll Express (Ricky Morton & Robert Gibson) (9:10)
- Amazing Red & Tomohiro Ishii defeated Los Ingobernables de Japon (BUSHI & Shingo Takagi) (8:48)
- CHAOS (Hirooki Goto, Rocky Romero & YOSHI-HASHI) defeated BULLET CLUB (Gedo, Jay White & KENTA) (12:28)
- Guerrillas Of Destiny (Tama Tonga & Tanga Loa) (c) defeated Roppongi 3K (SHO & YOH) to retain the IWGP Tag Team Championship (16:43)
- Hiroshi Tanahashi, Kazuchika Okada & Kota Ibushi defeated Los Ingobernables de Japon (EVIL, SANADA & Tetsuya Naito) (20:26)
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