- Promotion New Japan Pro Wrestling
- Event Type Special EventTournament
- Event Date October 21, 2021
- Event Series G1 Climax / IWGP League / MSG League / World League
- Year 2021
- Country Japan
- Location Tokyo, Japan
- Arena Nippon Budokan
- Network NJPW World
- Main Event Kazuchika Okada vs. Kota Ibushi
RESULTS
- [Kickoff]
Suzuki-gun (El Desperado & Yoshinobu Kanemaru) defeat Ryohei Oiwa & Kosei Fujita - United Empire (Jeff Cobb & Great-O-Khan) defeat Toru Yano & Yuji Nagata
- House of Torture (EVIL, SHO & Yujiro Takahashi) defeat CHAOS (Tomohiro Ishii, Hirooki Goto & YOSHI-HASHI)
- Bullet Club (KENTA, Tama Tonga, Tanga Loa & Chase Owens) defeat Hiroshi Tanahashi, Tiger Mask, Togi Makabe & Tomoaki Honma
-
Grappling Rules Match
Zack Sabre Jr. vs. Katsuyori Shibata ends in a Draw via Time Limit - Los Ingobernables de Japón (BUSHI, SANADA, Shingo Takagi & Hiromu Takahashi) defeat Tencozy (Hiroyoshi Tenzan & Satoshi Kojima), Ryusuke Taguchi & Master Wato
-
G1 Climax 31 - Final
Kazuchika Okada defeats Kota Ibushi via Referee's decision