Celia Knox: Well maintained open air museum of different historical buildings. Best ¥400 I've spent in a while. Could easily spend a whole day here :)
Jasper Van der Jeugt: Definitely worth the 400 Yen, unusually calm on weekdays!
Ernesto Hegi: Buildings from olden times, divided in three sections ranging from the 17th to the 20th centuries. The interiors contain materials and products from that time. The East-side is my favourite.
Thailand Walker: This is a "Subway Museum". There is under the rail bridge of Tozai Line. We can learn about Subway histories of Japan. Everytime I go there with my son.
Eric Dallemagne: Keio Rail-Land offers many attractions, including a large-scale ‘experience simulator’. A popular mini train runs along the perimeter of a fleet old-time train cars displayed outside.
Brennan Moore: More 'cabinet of curiosities' than museum and its free! Definitely go if you are in the area.
Andrew Shuttleworth: I'm not usually a big fan of museums, but it is entertaining to wander around and see the mix of historic items, photos and animal artifacts in the spacious and well laid out facility. All for free.
Jean-Noël Vignaroli: I won't define this place as a museum. It's a kinda mix of curiosities and old artifacts. Still an interesting place to wander. And it's free !
Carlos R: I wasn't expecting salt and tobacco to be this interesting. The exhibitions are very well done and some of them are incredibly high-tech. For 100 yen, it's well worth the visit.
daqla: Very clean, exhibits in both Japanese and English, free wifi, reasonable entry fee.