About Sumo Cup

Sumo Cup is an end-to-end operating system for amateur and professional sumo tournaments. It replaces the spreadsheets, paper brackets and ad-hoc scoring tools federations have relied on for decades — handling registrations, weigh-ins, bracket generation, live scoring, referee rotations and federation reporting in one connected flow.

National federations, regional clubs and event organisers running anything from a 30-athlete club meet to a 600-athlete international cup. The platform scales from a single dohyo run by one referee to multi-day, multi-venue events with 30+ officials and broadcast overlays.

Legacy systems were built for skiing, judo or wrestling and bolted onto sumo. Sumo Cup is sumo-native: dohyo-level scoring (East / West / Hikiwake), traditional rotations (gyōji, shimpan, recorder), correct handling of Best-of-3 and group-stage formats, and tournament reports that match the actual templates federations submit upstream.

Sumo Cup is used by clubs and federations across Europe. We started with the Polish Sumo Federation (PZS) and are in active conversations with the European Sumo Federation (EFS) and other national federations about adoption for sanctioned events.

The federation does. Sumo Cup hosts the data and provides the tools — but every export, every report, every athlete record belongs to the federation that produced it. Full data exports are available at any time in standard formats (CSV, JSON, federation-template PDF).

Yes. We encrypt PESEL and other identifying fields at rest, mask them by default in the UI, and log every reveal to an audit trail. National admins control consent and retention per athlete. Our active remediation plan is documented and reviewed quarterly.

Yes — and this is non-negotiable for us. Weigh-ins, match results and referee actions are written to a local outbox that replays on reconnect. A venue can lose internet for an hour mid-event and not lose a single result. Referees see a clear sync indicator showing queue depth.

The principal referee records the winner on the Live Match page; a time-only referee on a separate tablet runs the bout clock. Both are driven by the same authoritative server state, so the OBS broadcast overlay never drifts. Every result write is logged with operator, timestamp and previous-value for review.

Polish, German, English, Ukrainian, Greek, Spanish, Bulgarian, Italian and Russian today. Adding a language is a translation file plus QA, not a code change.

Sumo Cup is a usage-based subscription that scales with the events and athletes you actually run. The floor is €15 per month, billed yearly in advance. There are no per-entry, per-athlete or per-referee fees. Two add-ons are optional: premium technical support (priority response, priority feature work) and one-time onboarding (data migration, training session, federation-specific configuration). Try the live calculator on /pricing to see your exact monthly and yearly number.

Yes. Read-only endpoints for schedule, live match state and standings are documented and rate-limited. Broadcasters use these for live overlays; mobile apps use them for spectator features. Write access is reserved for authorised federation staff.

Three priorities: (1) video review and replay integration for protest handling, (2) athlete-side mobile app for registrations, schedules and personal results history, (3) federation-level analytics — head-to-head, club performance, season-wide trends.