I thought this may be a useful post for visitors to Hong Kong.
The public toilets in the city are not many, and they are not really clean. Hong Kongers shirk them and prefer to use toilets in shopping malls which are indeed many, or in McDonald’s restaurants, which are in every corner, or the big Chinese restaurants (酒樓) which are everywhere too.
Don’t try to find toilets in Hong kong’s MTR stations. They have no toilets unless it is East Rail Line (Between Hung Hom and Tuen Mun) and West Rail Line (Between Hung Hom and Lo Wu / Lok Ma Chau). Both MTR lines have toilets in each of their stations.
Therefore, Tsim Sha Tsui East station on East Rail line, has toilet, but not Tsim Sha Tsui station on Tsuen Wan line, though the latter station is much busier than the former.