In Japan it's quite reasonable to ride local trains. I've been meaning to do a trip along the recently re-opened Tadami Line [1], for example. The one way cost for the full 4-hour, 135km trip is only ¥2,750 ($17).

Though when you add in the costs of getting to the start/end of the line, overnight accomodations, and potentially the cost of getting to Japan first - it gets quite a bit more expensive. But staying at a little guesthouse along the way is also part of the charm.

[1] https://fukushima.travel/blogs/tadami-line-5-sights-you-shou...