As for cooking, it takes a long time...Japan food culture is opposed to bodybuilding, whatever you may say. Unless you cook for yourself you may spend $50/meal trying to get enough protein.
But I found a solution, many supermarkets have cooked food sections and you can get precooked chicken, etc., that is quite cheap.
Anyone else have any other advice on gyms? Is the Harajuku Gold's the best one, or are there other smaller ones in Shinjuku, for example.