Tag discussion: teacup

Currently the teacup tag covers both western and eastern teacups. We could:

A) Keep it how it is.
B) Create western_teacup and eastern_teacup tags, and implicate them both to teacup. (Like western_dragon vs eastern_dragon.)
C) Restrict teacup to western teacups, and make a separate yunomi tag for Japanese teacups. (There's currently an artist called yunomi that would need to be moved.)

I'm in favor of C but I'd like to get a consensus before changing things.

There's also chawan and gaiwan which further complicate the issue.

I don't like the idea of a chawan tag since the term is ambiguous. (Chawan is currently listed as the "other name" for rice_bowl.)

Since there doesn't seem to be any objections I'm going to start implementing C. It'll still be possible to create an eastern_teacup tag and implicate yunomi and whatever else to that, if someone wants to do that later.