Tokyo's a bit of a different story, due to the power crunch. First timers to Tokyo will notice nothing particular, though people who have been there before will notice differences everywhere that give a background feeling of endurance. Many escalators are shut down, Lights in all vending machines are off though the vending machines do still work. So much of the neon is turned off that going through Shibuya, Shinjuku and Akihabara at night was kind of creepy. There's just dark outside the train windows, with periodic lit streets. It's not unsafe, it's just so different from the usual from the norm that it stands out. Temperatures were decidedly warm when I was there, but not at summer heat level yet. Power consumption was between 70% - 90%. Either people will put up with melting all summer, or rolling blackouts will come back.
Oh, and Tokyo Tower is still listing slightly. The initial earthquake damage has been fixed, but if you look at it, it's obviously not fully straight yet.
Bottom line: Go to Japan. From a tourist perspective it's perfectly fine. And the folks there would appreciate the support.