NJPW G1 Climax 2019 - Night 12 was a professional wrestling event promoted by New Japan Pro-Wrestling (NJPW) that took place on August 1, 2019 in Fukuoka, Japan at the Fukuoka Citizen Gymnasium. It was broadcast on Samurai! TV.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- BULLET CLUB (Bad Luck Fale, Chase Owens & Yujiro Takahashi) defeated Clark Connors, Karl Fredericks & KENTA (8:11)
- Suzuki-gun (Minoru Suzuki & Zack Sabre Jr.) defeated Suzuki-gun (Lance Archer & Yoshinobu Kanemaru) (5:00)
- Kota Ibushi, Toa Henare & Tomoaki Honma defeated Hiroshi Tanahashi, Ren Narita & Shota Umino (8:18)
- CHAOS (Kazuchika Okada, Will Ospreay & YOSHI-HASHI) defeated Los Ingobernables de Japon (BUSHI, EVIL & SANADA) (9:14)
- Jeff Cobb  defeated Shingo Takagi  (12:27) in a G1 Climax 2019 Block B Match
- Toru Yano  defeated Jon Moxley  (5:08) in a G1 Climax 2019 Block B Match
- Tetsuya Naito  defeated Juice Robinson  (13:47) in a G1 Climax 2019 Block B Match
- Jay White (w /Gedo)  defeated Taichi (w/ Miho Abe & Yoshinobu Kanemaru)  (15:07) in a G1 Climax 2019 Block B Match
- Hirooki Goto  defeated Tomohiro Ishii  (18:01) in a G1 Climax 2019 Block B Match
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