Grapplers to Watch at The Okinawa Invitational 4 on may 23
The Okinawa Invitational returns on May 23 with its strongest field yet. This year’s bracket brings together experienced black belts, rising competitors, and several athletes with proven success under sub‑only rules. With EBI format in place, every match has the potential to swing on a single transition or escape. While the entire lineup is capable of making a deep run, three competitors stand out based on recent performances, technical style, and their ability to thrive in high‑pressure situations.
These are the athletes to keep an eye on as OI4 approaches.
Marco Auréllio de Queiroz
Representing Pirâmide Grappling in Rio de Janeiro, Marco Aurélio enters OI4 as one of the most decorated competitors in the bracket. He is an IBJJF Brazilian No Gi champion and a multiple time ADCC Open winner, and he brings a style built on pressure, timing, and technical clarity. Marco has spent decades training and coaching at a high level, and his ability to control pace makes him a difficult opponent for anyone.
In an EBI format, his strengths become even more pronounced. Marco is exceptionally hard to submit, and his back control and finishing mechanics are among the most refined in the field. If he reaches overtime, his experience and composure give him a clear advantage. He arrives at OI4 as a favorite and as a technician who understands how to win in a single‑night tournament.
Mateus Hirotomi
Mateus Hirotomi has quickly become one of the most active and well rounded competitors in the region. He has earned medals across AJP, ASJJF, SJJIF, and IBJJF events, and he brings a fast paced, athletic style that creates problems for opponents who cannot match his tempo. Mateus transitions from passing to back takes with precision, and he maintains a strong pace through multiple matches.
His ability to blend movement, pressure, and positional awareness makes him a serious contender at OI4. If he finds his rhythm early, he has the tools to push through the bracket and challenge anyone standing in his way.
Ibuki Arimatsu
Representing Leo’s Jiu Jitsu Academy and Pedigo Submission Fighting, Ibuki Arimatsu returns to the Okinawa Invitational after a breakout performance at OI2. During that event, he delivered one of the most memorable moments in tournament history when he defeated the much larger Marlon Barbosa Godoy in overtime. He went on to finish the night as the runner up, proving that he can rise to the level of elite competition.
Ibuki’s style is built for EBI rules. He is disciplined in back control, calm under pressure, and highly effective in overtime. His ability to stay composed in long matches and capitalize on small openings makes him one of the most dangerous competitors in the bracket. With the confidence of a previous finals run and a proven ability to perform on this stage, Ibuki enters OI4 as a legitimate threat to win the entire event.
A Deep and Dangerous Field
Although these three athletes stand out statistically, the full OI4 roster is filled with competitors who can change the direction of the bracket with a single submission. Leg lock specialists, pressure passers, and scrappy finishers all bring unique challenges, and the EBI format rewards athletes who can stay sharp through every second of regulation and overtime.
OI4 is shaping up to be one of the most exciting editions yet. The stage is set, the talent is deep, and the potential for breakout performances is higher than ever. Fight night is almost here, and the only question left is who will rise when the matches begin.
