Shimanto River Ultra Marathon Online Challenge Japan 2026: 2-Month Stage 2

Shimanto River Ultra Marathon Online Challenge 2-Month Stage 2 is a virtual 100 km challenge from the R-bies Sports Foundation. It is separate from the one-month November round already listed in ARC.

Accumulate 100 km over two months

Complete at least 100 km between 1 October and 30 November 2026 using TATTA. Multiple activities may be combined across the challenge window.

Participants must use the same RUNNET ID for entry and TATTA. The official rules require Japan residency and a compatible smartphone. The wider Shimanto online series accepts Running and Trail Run activity, not Walking, Hiking or Cycling, and manual activity entry is not treated as a substitute for tracked TATTA activity.

Entry status

Registration ran from 2 August to 25 September 2026 and is closed. This ARC draft is therefore for the active challenge period, not a currently bookable event.

Packages and rewards

Published package tiers are JPY4,990, JPY6,990, JPY8,990 and JPY12,990, depending on the selected participation gift. Every package includes a T-shirt, with higher tiers offering alternatives such as Shimanto udon, long-sleeve apparel, bonito tataki, cap, shorts, hoodie, Shimanto beef, eel or an original apparel set. Verified finishers receive a finisher medal.

Credibility

This is published directly by RUNNET/R-bies and linked from the official Shimanto Ultra online-challenge site. That provides a strong organiser and registration chain.