http://www.stat.go.jp/
The 2002 crime rate/pref was matched with 2003 population/pref (I couldnt find the 2002 population or 2003 crime rate). This probably wouldnt make too much difference I dont think, unless the crime rates decreased dramatically.
I tried to paste it in 'excel' format but failed, oh well.
- Pref. % of Population in prefecture involved in all crime
Osaka 3.41
Fukuoka 3.33
Hyogo 2.94
Chiba 2.79
Aichi 2.74
Mie 2.56
Saitama 2.53
Kyoto 2.46
Gifu 2.46
Tokyo 2.45
Shiga 2.36
Okayama 2.32
Ibaraki 2.26
Wakayama 2.24
Nara 2.23
Kanagawa 2.19
Miyagi 2.08
Hiroshima 2.06
Gumma 1.96
Tochigi 1.94
Kagawa 1.91
Okinawa 1.90
Ehime 1.73
Yamanashi 1.72
Fukushima 1.70
Yamaguchi 1.70
Fukui 1.68
Hokkaido 1.66
Shizuoka 1.66
Kochi 1.59
Kumamoto 1.55
Nagano 1.54
Miyazaki 1.52
Saga 1.52
Niigata 1.46
Toyama 1.46
Ishikawa 1.41
Oita 1.41
Tokushima 1.40
Tottori 1.34
Aomori 1.31
Shimane 1.20
Yamagata 1.17
Iwate 1.07
Kagoshima 1.07
Akita 1.03
Nagasaki 0.93