In the most populous city in the world, space is limited, and just finding a place to lock up your bike for the day can be a challenge.
Giken Ltd's ECO Cycle System in Tokyo is trying to change that by building more bicycle parking... underground.
The Japanese construction company has developed 38-foot cylinders that are placed in the ground and can store up to 204 bikes each.
In Konan Hoshi No Koen Park of Tokyo, multiple systems have been installed.
This is how it works: Customers attach an "IC tag" to the front of their bike and then place it in front of the elevator-style doors. A mechanical arm attaches to the bike and it is then brought down the center of the cylinder by a "transporting tray" to its assigned storage spot. When the users return, they swipe an "IC card" that the machine gave them, and the bike is returned within 13 seconds to street level.