Hiking Japan

Kiso Road Tours

Oku Japan Hiking Tours and Info  (send off for a GREAT packet!)

Magome to Tsumago - Kiso Road 2018

Hiking in Japan: 15 awe-inspiring trails

Japan Guide Hiking

Comprehensive map with links and brief information about hikes

Kumano Kodo

Nara Hiking

Southeast of Kyoto  Hiking 

Has itineraries, maps, etc.

https://www.halfwayanywhere.com/japan-hikes/

Blog, english speaker, probably American ?sensitivity to Japan culture?, looks like more strenuous mountain hiking, but extensive experience

https://www.skyscanner.net/news/top-15-japanese-hikes