Don't go under ground in Osaka, you'll regret it. Crews have been lost for hours under there. Disoriented for sure, but not hungry, at least if you have some yen. When you finally pop out of the rabbit hole, you will have no idea where you are. Make sure you have Maps2Go or some other phone app and Be sure to have put a star on the hotel be fore you go out. Enjoy your noodles