If I had to choose just one, it would probably be Ehime.
I love how varied it feels — quiet historic towns, cycling routes, mountains, coastline, small local businesses, traditional crafts, and places where everyday life still feels very visible.
It is also a region where you can slow down easily. You can spend time in historical places like
Ozu, explore smaller towns and
valleys, travel by
local train, meet people who are deeply connected to their
communities, and discover
experiences that rarely appear on a typical first-time Japan itinerary.
That combination of nature, local culture, and unhurried travel is very close to what Inner Japan is about.