Best Worst
1. Akita 1. Osaka
2. Iwate 2. Aichi
3. Kagoshima 3. Kyoto
4. Yamagata 4. Saitama
5. Nagasaki 5. Hyogo
Arrest rate
Best Worst
1. Fukui 1. Osaka
2. Yamaguchi 2. Saitama
3. Yamagata 3. Aichi
4. Akita 4. Hyogo
5. Shimane 5. Wakayama

Not a few Japanese think these detariorating crime rate and dropping arrest rate is resulted from gaijin influx(especially Chinese and South American). Aside from whether this is true or not.