Tokyo has got absolutely zip. Get a Gold's membership and use the Golds here. There are a few and they are 24 hours. In Singapore, same story but the gym is not Golds. Either California or one other that is in Suntec. In In Shanghai and Jakarta the offerings to the best of my knowledge are similarly paltry at the actual hotels. I think the only time I have seen a full on gym was in Beijing. If you want more than 40kg on the dumbbells and a smith bench you usually need to offsite.