Recently visited tokyo as wheelchair user. Heres the real accessibility situation without sugar coating:

excellent: all major jr stations have elevator access. Newer developments like tokyo station and shibuya redevelopment completely accessible. Major museums have ramps and proper accessible bathrooms.

challenging: older subway stations still lack elevators. Asakusa area has many stairs and uneven surfaces. Traditional areas prioritize historic preservation over accessibility updates.

mixed results: department stores accessible but crowded navigation difficult. Restaurants wildly inconsistent - chains usually good, traditional places often have steps at entrance.

helpful resources: tokyo metro publishes accessibility maps showing exact elevator locations. Station staff incredibly helpful with directions and assistance when asked.

Overall much better than expected but requires advance planning. Stick to newer areas and major transport hubs for smoothest experience.