Welcome to Doha. It will be a culture shock coming from Japan where everything is so well organised!

In Doha, there are about 2000 japanese citizens, your japanese speaking might help getting closer to them. There are a few japanese restaurants ( though not authentic) also some korean restaurants serving japanese food as well and you can buy some japanese frozen food in some of the supermarkets.

Regarding the social,, very limited. Sometimes the Embassy might organise some japanese music festival, and the japanese community gets together for some outings or sports events.

I hope this can help,,

Ima wa totemo atsui desu, 50 C chikaku desu!

kio tsukete kudasai!