not even entirely sure it is a character haha but maybe it’s just really stylized and someone can recognize it?
It looks like 谷 to me.
https://jisho.org/search/九谷 this maybe
Could be this one 合, stylized between semicolons.
合 is a traditional unit of measurement so combined with 九 it could be that it is representing how much content the teacup can hold.
Or ofcourse what @Jakkumaru said.
thanks everyone! Yea I def think it’s 九谷 from 九谷焼, that makes a lot of sense.
I feel like I probably should’ve seen that haha oh well