Made an overview of all Poké Lids in Japan for my trip this summer, sharing here in case it's useful to someone else too. I've color coded each prefecture so you can see which ones will give you a different location background Pikachu.
For Japenese version: https://www.google.com/maps/d/u/0/edit?mid=1QPKuUgVDUhKN9KJVgS_WmnIpFDQqOLM&usp=sharing
Locations imported from https://local.pokemon.jp/en/manhole/
For more information: https://pokemongo.com/news/pokelidsr_kyushu_okinawa
by vdbarg