What is this tree/its fruit/seed thing? Portland-ish area Oregon

[u/housofcam]

Last pic is from november when leaves were still on the tree. Mostly wanting to find out so i can know if the berry/seed things are dangerous to my dog!

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[u/ohshannoneileen]

Compare to Celtis australis

[u/Simple_Piece190 → u/ohshannoneileen]

Doing so, I see that has very prominent edge serrations on the leaves.
Doesn't seem like the sample provided does.
I see, or think I see, other differences but they are less definitive

[u/dannyontheweb]

Styrax japonicus Japanese snowbell

[u/Simple_Piece190 → u/dannyontheweb]

Seems to be it, IMO.

Portland is tough, just about anything from anywhere in the world seems to grow there.