We found this sign in a Tokyo railway station we had not noticed elsewhere. So we wondered, why use a bear to warn us to be careful about doors opening (when they actually slide on trains). We figured out they could be talking about the Ueno Zoo that has sun bears, black bears, pandas and who know what else. Thanks for the heads up guys. We’ll definitely climb a tree if a cage door opens and your bears decide they want to share our burgers with cokes and fries.