The bulk update request #4063 is pending approval.

mass update shin_(artist) -> shin.
create alias bl_s21 (12) -> shin. (13)

Reason: Multiple tags for the same artist.

shin_(artist) seems to be a better tag to me. shin. can be a typo for an actual shin, perhaps a misclick in the autocomplete for not noticing the ., while shin_(artist) is clearer that it means artist named shin.

Shin is a very generic name. I'd be surprised if there aren't characters named that.