Kirk here with a share from Untapped Kumamoto about cycling in Aso: “You can rent a bicycle at JR Aso station and they are available on a first come, first served basis.”

https://www.facebook.com/untappedkumamoto/posts/pfbid0wN1bjtMjSvLQ96d2w2FAC7CrQoveToWrts89E4ivXX7kEK2KxnabUbtfiu8YPP8Ql