I use Tipness Roppongi, but our dumbells are only up to 40kg. This is the high end at most Japanese gyms as that is generally considerd the cut off to not attract the serious body builders. The logic escapes me but I am just telling it the way it is.
Mike
I've never heard of that, but it certainly doesn't work at Tipness Nanba (like the only one in Kansai without a pool).