Tenryuu('s) Kindergarten pool name

pool #9895

I have not once seen the concept referred to in possessive mode, it's always "Tenryuu Kindergarten".

Even the japanese pixiv tag 天龍幼稚園 doesn't indicate a possessive. Why are we insisting on it?

Because without a possessive it could be read as tenryuu in kindergarten rather than tenryuu running a kindergarten?

"Tenryuu Kindergarten" sounds like it's named after her, just like any other school or institution that's named after someone. For example, a certain famous hospital isn't named Johns Hopkins's Hospital.

I literally do not understand how it could possibly be taken as her being in it.

Ok, my English is shaky, but I always kinda presumed it means "Tenryuu and her kindergarten group", hence the possessive?

There's not exactly room for misunderstanding. The possessive is there likely so it's an easier read, and with the context given (the pool description and the images contained within) there's not enough confusion to warrant a change.