Okinawa Invitational 4 brings one of its most competitive brackets yet, and several athletes stand out as potential front runners. Marco Aurélio de Queiroz enters as the veteran technician with championship experience and a style built for sub‑only formats. Mateus Hirotomi brings speed, athleticism, and a proven ability to push a hard pace through multiple matches. Returning finalist Ibuki Arimatsu also returns to the spotlight after his memorable overtime victory against Marlon Barbosa Godoy at OI2. With these three leading the conversation and a deep field behind them, OI4 is shaping up to be one of the most exciting tournaments in the series.