The May 2026 Grand Sumo Tournament began Sunday with upper-division bouts held at the Ryōgoku Kokugikan arena in Tokyo [1, 2].

This opening day sets the stage for the top-ranked rikishi to compete for dominance in one of Japan's most traditional sports. The tournament serves as a critical benchmark for rankings and prestige within the professional sumo hierarchy.

NHK World-Japan provided live broadcasts and highlights of the Day 1 action on May 10, 2026 [2]. The coverage focused on the upper-division wrestlers, who face a rigorous schedule over the course of the event. This specific tournament is scheduled to last 15 days [1].

While the current bouts are taking place in Tokyo, the sport has seen a renewed interest in international expansion. Some reports indicate a historic return of Grand Sumo to London after 34 years [3] — though the primary competition for the May tournament remains centered in Japan.

The Ryōgoku Kokugikan arena continues to serve as the primary hub for these events, hosting the top-tier wrestlers in front of a global audience. The 15-day format ensures that every wrestler's consistency is tested before a champion is crowned.

Organizers aim to present the first bouts of the tournament to a global audience through digital platforms [1]. This strategy allows international fans to follow the progress of the rikishi in real time as they navigate the early stages of the competition.

The May 2026 Grand Sumo Tournament began Sunday with upper-division bouts.

The commencement of the May 2026 tournament highlights the ongoing tension between sumo's deep roots in Tokyo's Ryōgoku Kokugikan and its efforts to globalize. While the core competition remains anchored in Japan, the simultaneous interest in international exhibitions suggests a strategic push to expand the sport's reach beyond its traditional borders.