Every chance I've had, I've planned a 1 night stop in Tokyo. It's a great city for that, there are parts that never seem to close, so any time you land you can do something, if you don't feel like sleeping yet. Every time it's been a late night landing in HND and a late afternoon departure from NRT.
When I'm on my own, I book a capsule hotel. Cheap, and great fun. And very Tokyo.
I've been to Japan many times, so maybe I'm just used to it, but I have never had an issue getting around, despite not being able to read kanji. Plenty of Romanji (english character) signs in Tokyo, especially on transport. Any why not just get lost? It's an incredibly safe city. Your GPS or a friendly stranger will help you back.