The English documentary of ULTRA-TRAIL Mt.FUJI 2023 will be broadcast worldwide on NHK WORLD-JAPAN.
6 times a day considering the time difference. It will also be streamed at the same time as the broadcast.

GREAT RACE　Back in Full Form: Ultra-Trail Mt. Fuji 2023
Saturday, September 16 9:10/ 15:10/ 21:10
Sunday, September 17 3:10 （JST)
https://www3.nhk.or.jp/nhkworld/en/special/episode/202309160910/

The program will also be available on demand starting next week.NHK-WORLD JAPAN also offers on-demand distribution of programs broadcast in 2022.
You can still watch this!
https://www3.nhk.or.jp/nhkworld/en/ondemand/video/5001367/