The Hara Model Railway Museum in Yokohama is a special place to visit. But due to the covid-19 pandemic, the Railway Museum is closed indefinitely. You can start off by experiencing real train driving by trying Ugotetsu (a train simulator). Nobutara Hara, the creator, has a nice display of his HO Gauge Models. Mr. Hara has an impressive collection and knowledge of model train history. The Hara Museum has some very colourful dioramas or three dimensional miniature railways. It is definitely a worthy side trip to visit the Hara Model Railway Museum.
https://www.hara-mrm.com/english/index.html