If Japan does not complain about its violation of civil law, it will take coordinated measures to solve it, basically like China.
In fact, it's all the same to put it bluntly! No matter which country it is! Harmony!
For example, driving:
Judging from what you wrote, the responsibility should be on the driver. If your Japanese is not good, you should talk to your tutor or the general affairs teacher in charge of international students in the school, and the school will help you contact.
First of all, you should go to the hospital for a check-up. You'd better have a fluoroscopy to see if there is any bone injury. The diagnosis fee shall be borne by the other party in full. Remember not to use your own health certificate at this time, but pay the full amount at your own expense.
If it's just a skin injury, you can solve it yourself without notifying the police. Generally, the other party will give you some financial compensation, depending on your injury.
If the injury affects employment, the other party shall bear the losses caused.
In addition, if the bicycle is damaged, the repair fee will also be borne by the other party.
Because the responsibility lies with the other party, he usually wants to solve it privately. If he doesn't agree with your request, then inform the police.