DEEP JAPAN ULTRA 100 attracts runners from 34 prefectures across Japan—including Niigata—as well as from 16 countries and regions worldwide (based on 2026 data).

We offer both event sponsorship and EXPO exhibition opportunities, tailored to your company’s specific objectives.

For further details, please refer to the "Guide to EXPO Exhibition" included in this post.

Registration is now open for the 2027 event.

Please note that there are changes compared to the 2026 race.

On Thursday, September 24, 2026, as part of Trail Runners' SDGs project, the "National Mountain Region Future Building Project," we held a "Dream Lesson" at Gejo Elementary School in Tokamachi City, Niigata Prefecture, as a contribution to the local community around the venue of DEEP JAPAN ULTRA 100." The lesson taught students how to turn their passion into a job while remaining in their hometown.

On Thursday, September 24, 2026, as part of Trail Runners' SDGs project, the "National Mountain Region Future Building Project," we held a "Dream Lesson" at Ishiuchi Elementary School in Minami Uonuma City, Niigata Prefecture, as a contribution to the local community around the venue of DEEP JAPAN ULTRA 100." The lesson taught students how to turn their passion into a job while remaining in their hometown.

On Tuesday, September 11, 2026, as part of Trail Runners' SDGs project, the "National Mountain Region Future Building Project," we held a "Dream Lesson" at Kuzumaki Elementary School in Mitsuke City, Niigata Prefecture, as a contribution to the local community around the venue of DEEP JAPAN ULTRA 100." The lesson taught students how to turn their passion into a job while remaining in their hometown.

On Tuesday, September 11, 2026, as part of Trail Runners' SDGs project, the "National Mountain Region Future Building Project," we held a "Dream Lesson" at Honai Elementary School in Sanjo City, Niigata Prefecture, as a contribution to the local community around the venue of DEEP JAPAN ULTRA 100." The lesson taught students how to turn their passion into a job while remaining in their hometown.

On Tuesday, September 8, 2026, as part of Trail Runners' SDGs project, the "National Mountain Region Future Building Project," we held a "Dream Lesson" at Oguni Elementary School in Nagaoka City, Niigata Prefecture, as a contribution to the local community around the venue of DEEP JAPAN ULTRA 100." The lesson taught students how to turn their passion into a job while remaining in their hometown.

On Tuesday, September 8, 2026, as part of Trail Runners' SDGs project, the "National Mountain Region Future Building Project," we held a "Dream Lesson" at Fukazawa Elementary School in Nagaoka City, Niigata Prefecture, as a contribution to the local community around the venue of DEEP JAPAN ULTRA 100." The lesson taught students how to turn their passion into a job while remaining in their hometown.

On Tuesday, September 8, 2026, as part of Trail Runners' SDGs project, the "National Mountain Region Future Building Project," we held a "Dream Lesson" at Koshiji West Elementary School in Nagaoka City, Niigata Prefecture, as a contribution to the local community around the venue of DEEP JAPAN ULTRA 100." The lesson taught students how to turn their passion into a job while remaining in their hometown.

Aid Station Information Map.

*Private support is available at aid stations marked with "Personal Support (P.S.)" on the aid station information map.

If you believe any of the following lost or left-behind items belong to you, please contact the Mitsuke Police Station.

Items : two poles, one pair of women's shoes, a watch, gloves, a hand towel, two jackets, and a headlamp.

You can view the live archive containing interviews with almost all the athletes immediately after they crossed the finish line via the link in the post.

On Thursday, June 18, the "Dream Class" initiative was featured in the Niigata Nippo newspaper.

On Monday, June 15, 2026, we conducted a "Dream Class" at Ishizaka Elementary School in Nagaoka City, Niigata Prefecture, as part of the Nationwide Mountainous Area Future-Building Project. The instructor was Gediminas Grinius, a world champion in ultra-trail running, while Matsunaga served as both an instructor and interpreter.

There are lost items that were turned in during the event.

If you have any information regarding this matter, please come to the Irihirose Sports Center by this morning.

We have started returning the drop-back bags.

Return time：6/28 (Sun) 06:30-12:00

Retrun location：IRIHIROSE SPORTS CENTER, 1st Floor

"YouTube Live" stream started.

• Part 1 is available ＜here＞.

• Part 2 is available ＜here＞.

• Part 3 is available ＜here＞.

• Part 4 is available ＜here＞.

• Part 5 is available ＜here＞.

The event will proceed as scheduled.

Please register for the "CocoHeli" app via the link in this post.

Cold weather kit has been removed from the list of mandatory gear.

Please note, however, that temperatures drop on the ridgeline and at night. Competitors who feel they need more than the list of mandatory items should make preparations according to their own skill levels.