I’ve only watched Terrace House: Opening New Doors but there are several different options taking place in major tourist destinations. There’s Tokyo, Aloha State, and more. I haven’t watched all of the variations so I can’t comment on those directly, but they all follow the same premise as Terrace House: Opening New Doors.
The premise is simple and conventional. Six young people live in a house and we follow their interactions and budding romantic relationships. It’s like The Real World, Japanese edition. The Real World is arguably the first popular reality TV show format. But while Terrace House keeps in tradition by using the same general format, the tone is significantly different.