The opening night of New Japan Cup 2023 took place on March 5, 2023, at Korakuen Hall in Tokyo, Japan, marking the start of New Japan Pro-Wrestling (NJPW)’s annual heavyweight single-elimination tournament and featured two first-round matches.
Seiya Sanada
Maki Taichiro
Tetsuya Naito
Riley Vigier
Hiroshi Tanahashi
Kazuchika Okada
Tomoaki Honma
Hirooki Goto
Tomohiro Ishii
Nobuo Yoshihashi
Lionel Gerard Green
Toru Yano
Yōhei Komatsu
Tetsuya Shimizu
Hiromu Takahashi
Shin Takagi
Steven Owens
Keiji Takayama
Kenta Kobayashi
Kyosuke Mikami
Minoru Suzuki
Yuto Nakashima
Hirai Kawato
Ryusuke Taguchi
Ren Narita
Shota Umino
Shigeki Sato
Takaaki Watanabe
Sho Tanaka
Yujiro Takahashi
Ryohei Oiwa
Alipate Aloisio Leone
Kosei Fujita
Luke James Uggles Eatwell
Tatsuya Hayama
Takao Yoshida
Yoshinobu Kanemaru
Kevin Foote
Chris Charlton