Tokyo station accessibility is surprisingly good - elevators to every platform and clear signage. Shibuya station is a nightmare with crowds and narrow elevator access. Most temples have steps with no ramps so they're basically inaccessible.

Newer areas like odaiba and tokyo skytree area are fully accessible. Older neighborhoods like asakusa are hit or miss. Department stores all have wheelchair accessible bathrooms and elevators but traditional restaurants often have steps up from street level with no alternative access.