Tournament:Seibugeki 15

Seibugeki 15 was a Super Smash Bros. Ultimate major held in Hachioji, Tokyo, Japan, on October 28th, 2023. The event took place on the same weekend as in  and as a result several players were in attendance for both.

Super Smash Bros. Ultimate singles
(300 entrants) Top 64 Bracket Top 8 Bracket