CHIP-IN - in this one a group of family members comes together , so not strangers. But it has all the other parts of an Agatha Christie novel, meaning it all takes pretty much place in one house, everyone is suspicious, they all do not like one another but are invited by a person for a specific reason etc. It is quite good
Anata no Ban Desu - here it is about residents in an appartment complex
3 Nen A Gumi: Ima kara Mina-san wa, Hitojichi Desu - here it is pupils in a class that get "killed"
100-manen no Onna-tachi
These 2 are more game shows, where people are invited to.
Squid Game
Liar Game
If you do not mind some non-asian dramas, I'd recommend you;
Anime:
- Kubikiri Cycle - anime but similar story
- Subete ga F ni Naru - anime, this one is solely about a situation that you wish to see, there is however also a Japanese drama adaption Subete ga F ni Naru, which is however covering all the novels and thus only focuses on one episode on the specific type of drama you look for. So I'd actually recommend you the anime.
Western series:
- Murder at the end of the world
- The Girl in the Mirror - here they know each other, so not strangers, but it got the mystery to it.
