In Tokyo, lots of people use bikes because they are easy, fast, and good for the environment. The city is very crowded, which makes bikes a good choice to get around faster than cars or buses, especially for short trips. Both locals and visitors use bikes to move through the city’s busy streets and tight lanes. But even though there are a lot of cyclists, Tokyo doesn’t have many bike lanes. Most people on bikes share the road with cars and other vehicles, or ride along footpaths. This may seem odd but may be because of old customs, the fact the city is really packed, and people there tend to get along well together, whether walking, biking or driving. Even without many bike lanes, Tokyo’s strong sense of discipline and respect helps keep the roads fairly safe for cyclists.
Here’s a link to the city.