Oceanshaft

Hmm, what is this fruit? It's from those trees that line the driveway into my school campus. It's not maple or chestnut, but the tree has leaves like maple leaves, although the leaves for this tree are three-lobed. Anybody know?

Update: After some searching on the internet - using terms like "three lobes", "palmate" "maple", etc. I think I can conclude it's a sweetgum. From the japanese sites, it's probably American sweetgum (Liquidambar styraciflua) or Chinese sweetgum (Liquidambar formosana) since they seem to be the only ones planted in Japan. Well, something new learnt today. Cheers!