If you visit a graveyard in Japan (they’re attached to temples), you’ll probably see the Legend of Zelda Triforce symbol on at least a few stones:

It’s just a common family crest (kamon) – belonging, the internet tells me, to the Hōjō clan. Kind of cool, though!

Of more interest to me, however, was this carving I saw on a temple door, somewhere in Shizuoka city:

...No? Bit of a stretch?