On my wander I discovered a tiny chicken nanban restaurant, Ogura, that's apparently quite famous. There was a line around the block. Nothing to do, I joined the queue and an hour I later was eating the best chicken nanban I've ever had prepared and served by sweet old Japanese who don't speak a word of English.
late night ramen
Traditionally in an izakaya dining experience, you'll finish the night with a noodle or rice dish in order to fill up after the otsumami (small drinking snacks) courses. An alternative that's quite popular with many Japanese drinkers, is to stop off for a bowl of late night ramen. Typically these ramen shops will be packed with happily drunk people slurping bowls of soup while chatting boisterously with lots of laughter.