21 days trip advice

Dear Experts,

We (three persons) are planning a trip in early Feb 2023, fly into tokyo, fly out Osaka, total 21 days. We love to visit beautiful and nature onsen places, eg Takaragawa onsen, other than normal places of interest. We can travel via shinkansen pass.

We appreciate your suggestions. Thank you so much in advance!

There is a lot of informs already on the JG pages. Id suggest you start studying that and come up with a list of places you want to visit and potentially a route. And then come back to this forum for sanity check/ fine tuning.

Here is the link Likebike was suggesting: https://www.japan-guide.com/e/e2400.html