Taiwan is just about 4 hours from Tokyo. Before this pandemic, Peach and other airlines provided many budget airflights including midnight services. I really miss these days and wish to visit there again.
As you may know, there is a High Speed Rail (高鉄) in Taiwan West Coast and they provide remarkably frequent services in active economy corridors. I took this HSR with my son. There were so many passengers on board, so I and my small son sat separately in fully occupied train. The series 700T is produced by Kawasaki Heavy Industries. It is interesting that the sign in seat table is almost same as Shinkansen.
In Taiwan, we can enjoy yummy foods in night markets, and we had jiaozi and suān là tāng there. I like suān là tāng hot soup with tasty chicken, mushrooms and vegetables. My son was surprised at the smell of chòu dòufu in the market and honestly, he does not like it.