Aliasing touge36⑨ -> touge369.
Aliasing touge369 -> kubiwa_tsuki.
Aliasing touge36⑨ -> kubiwa_tsuki.
Reason: It is stated in howto:tag that only easily typeable characters should be used in tags. If the artist's real name is Kubiwa Tsuki, then the best solution would be to alias both variants to kubiwa_tsuki. (See discussion below.)
Edit: I tried creating an alias in the other direction by adding touge369 to the "Other Names" field in the artist entry. This did not work the way I had hoped, tag searches for touge369 (or kubiwa_tsuki) are not being mapped to touge36⑨. Wouldn't it be beneficial to let alternative artist names work as implicit tag aliases?
Edit 2: Standarized the alias request.
Updated by jxh2154