K-1 WORLD GP 2021 JAPAN ～K’FESTA.4 Day.1～
- Odun: 2021
- Orilẹ-ede: Japan
- Oriṣi: Action
- Situdio: GAORA, ABEMA, M-1 SPORTS MEDIA
- Koko-ọrọ: kickboxing, combat sports
- Oludari: 中村拓己
- Simẹnti: Tatsuya Tsubakihara, Yuki Egawa, Hideaki Yamazaki, Fukashi Mizutani, Yuta Murakoshi, Ryusei Ashizawa
