I actually have a little experience in this area, having suffered a concussion, situational loss of memory, and a permanently separated shoulder with severed ligaments, due to a bicycle accident caused by an out-of-town driver on Enoshima Island.
You will get absolutely nothing-zero, for emotional damages suffered in an accident between a bicycle and an automobile.
Damages are awarded using a point system listed in an insurance guide. The level is determined by medical examinations from a hospital used to base a disability rating, along with age, profession, and earnings.
I consulted a Japanese attorney within a week of the accident-that helped tremendously. I also contracted an Tokyo based NGO that specializes in assessing damages in personal injury cases. A representative met with my doctor in Kamakura, just to ensure that the doctor's notes included key terminology.
Two years and a half years after the accident I was awarded just over 18 million Yen after attorney fees. It came as a nice surprise. I had expected 5 million-tops.
None of that included emotional damages.