Londonist had published an article some time back comparing the London Tube and the Tokyo Metro. I have stayed in Tokyo for over 16 years and for business reasons I regularly travel to London and board the Tube/Underground. I personally feel the blog Londonist made a shallow attempt to “compare” these services and declare London a winner. Londonist has some wrong data too used, but I do not want to get into that in this article.
I have extensively used both the services and at a fundamental level both do a very good job taking commuters from point 1 to point 2. I feel there is a lot both of them can learn from the other. Although Tokyo Metro has strong 4G network, access to free WiFi at all stations, I think from a fundamental requirement perspective the availability of PUBLIC TOILETS STANDS OUT the most.
Finding a public toilet at ANY Tokyo Metro station is pretty easy. Just look for the restroom signs on the platform or the vicinity of the station and you will be guided to Western and Japanese style toilet without even the need to ask anyone. I got down on the Kudanshita Station the other day and took a few snaps. Clean and beautiful experience. EASY TO LOCATE, FREE, REASONABLY CLEAN, ALL STATIONS
You will always find Men, Women and the step free multi functional toilet for physically disabled commuters with additional baby changing facilities. Rest rooms in Tokyo Metro are reasonably and relatively cleaner than the ones on the London Underground Stations.The restrooms in Japan also have dispensing machines for paper tissues, towels and a face mask too.
A soap at the wash basin, a regular thing in Tokyo with winters also seeing alcohol bottles to help stay clean of influenza and cold viruses. Comparing this Tokyo experience with my experience in London
 SOME stations in London DO NOT HAVE toilets. Some stations like BANK have sign boards saying “No toilets at this station”
 TOILETS ARE NOT ALWAYS FREE. SOME PLACES YOU PAY 50 pence = 90 YEN!!!!!
 At Westminster when I went at morning 08:00 the toilet was chained and closed. They are not in sync with the time when the trains are running and HAVE FIXED OPERATING HOURS! See the below snap at 08:00 a.m. at Westminster StationThe London Underground website publishes a map where there are toilets and where are the Paid ones. The coverage can be called at the best 50%. For toilets in case they are closed and chained as above, the direction is that find a member of staff who will assist you. That’s inconvenient.
The underground map which shows which stations in central London have toilet facilities.
LONDON is a beautiful place and last time I got on to the London Eye for the first time in the many years of my travel to the city (the below snap). It can be further convenient if the Tokyo Metro restroom infra is replicated in this beautiful city.