Implicating tea_set -> teacup.
Implicating tea_set -> teapot.
Reason: Means a tea set must at least contain a teacup and a teapot. Otherwise, it's not a set. At least that would be my definition of a tea set.
I had a quick look at the posts and all feature a cup and pot = doesn't seem like it needs cleanup. Most of them also include a tray and saucer, but most != all.
edit: Okay, I might have found an exception to the teacup implication. Assuming post #417332 counts as tea_set and not as some set for serving hot sake. That cup looks like a sakazuki.
Updated by jxh2154