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On my last trip to Tokyo in February I went to a Kaiten-Zushi (Conveyor belt sushi) restaurant with my friend in Shibuya. This was my first time to go to a Kaiten-Zushi restaurant since I've been in Japan. Usually I am not a big fan of sushi but I have to admit the sushi here wasn't too bad at all.
Kaiten-Zushi: http://en.wikipedia.org/wiki/Conveyor_belt_sushi