Koyo of Yoro Valley happens during the end of November to the begining of December.
Koyo of Yoro Valley (養老渓谷の紅葉) is one of the famous Koyo in Kanto. Yoro Valley is located in the middle of Boso Peninsula, Chiba prefecture. On the riverside of Yoro river, there is a beautiful hiking course and you can enjoy stunning view of red valley.
Tourist Info.
You can start hiking from Yorokeikoku station, and end at Awamata Falls. There is a bus to head back to the station. It will take entire day hiking.
Access
0. at Kisaradu Station.
1. use JR Uchibo Line to Goi (21 min.)
3. use Obatatetsudo Line to Yorokeikoku (1 hr.)
3 hr.
New Wave Samurai Movie. 
映画好き集まれ！ 
Koyo of Yoro Valley happens during the end of November to the begining of December.