Originally Posted by
fleuve
With a valid transit visa, is it allowed for me to-
enter Russia until late afternoon and went back to airport to catch my next segment?
Answer is yes. I've done it twice. On your Transit visa application you should indicate "Transit to Japan" at some point, and they'll almost certainly ask to see the tickets.
From SVO you can get to Moscow on the express train, which is the best way to avoid Moscow's traffic, transfer on the green line and hop off at Teatralnaya to get to the red square.
Originally Posted by
fleuve
Enjoy the lounge(sleep) until morning
It says on the airport's site that the access to the lounge is limited to 3 hours. Not sure if it's enforced but just be aware of it.