Some locations from Little Busters:
The interior of the school from Little Busters! is based on a highschool in Kusakabe (春日部市), north of Tokyo; unfortunately you can’t enter it unless you are a student. The school’s name is: 埼玉県立春日部高等学校.
The shopping district from Little Busters! Don’t know the exact location but pretty sure it’s somewhere in Tokyo.
The shopping station from Kud Wafter. Apparently it’s in a city called Nishinomiya/西宮市 in front of the railway station.