NJPW G1 Climax 2019 - Night 15 was a professional wrestling event promoted by New Japan Pro-Wrestling (NJPW) that took place on August 7, 2019 in Hamamatsu, Shizuoka, Japan at the Hamamatsu Arena. 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.
- Suzuki-gun (Minoru Suzuki, Taichi & Yoshinobu Kanemaru) defeated Toru Yano, Yota Tsuji & Yuya Uemura
- CHAOS (Hirooki Goto & YOSHI-HASHI) defeated Jon Moxley & Shota Umino
- BULLET CLUB (Chase Owens, Jay White & Yujiro Takahashi) defeated Juice Robinson, Toa Henare & Tomoaki Honma
- Los Ingobernables de Japon (BUSHI, Shingo Takagi & Tetsuya Naito) defeated Jeff Cobb, Ren Narita & Tomohiro Ishii
- SANADA  defeated Lance Archer  in a G1 Climax 2019 Block A Match
- Bad Luck Fale  defeated Hiroshi Tanahashi  in a G1 Climax 2019 Block A Match
- Will Ospreay  defeated KENTA  in a G1 Climax 2019 Block A Match
- Kota Ibushi  defeated Zack Sabre Jr.  in a G1 Climax 2019 Block A Match
- Kazuchika Okada  defeated EVIL  in a G1 Climax 2019 Block A Match