Those prices don't sound bad. If there wasn't the language barrier I'd be out in a flash (I've heard my C# and SQL Server Otaku skills would be in great demand in Tokyo). FYI A 1 modest bed flat in Colchester, Essex, UK is about 94,000 Yen per month...
I spent hours in the Shinjuku branch. I bought some lovely wacky birthday cards in there that I've not seen in the UK, although I regret not buying the Yamanote Line alarm clock.