I can be quite expensive but wages paid even it up. I work about 265 days a month and get about 1500 quid for it.
I regards to transport, travelling inside Tokyo is a LOT cheaper than it is travelling in London. Restaurants are not all that expensive either, you can get a decent 3-course meal for less than 20 pounds, depending on where you go.
Hotels can be expensive and appartments are too, and small, but I'd rather be living here than in London or Paris, or anywhere. It's VERY safe here too. No F****** chavs either.
Just don't know when the big quake is going to hit and wipe a few million away though.