Bicycles are frequently stolen here in Japan. I’ve experienced it myself.
The difference is that most bicycles are registered with the police and the police take theft seriously, so you’re likely to get it back.
Also, the majority of bicycles here have a dinky little lock attached to the frame over the rear wheel, so it is easy to lock in seconds.
Although the locks are not very strong, they decrease crimes of opportunity I would imagine. In fact the one time my bicycle was stolen it had been left unlocked.