From: Effects of campaign for postpartum vaccination on seronegative rate against rubella among Japanese women
Regions (prefectures)
Direction from Tokyo
No. of women
A (Hokkaido)
830 km N
1450
B (Toyama)
260 km NW
803
C (Tochigi)
100 km N
2467
D (Tokyo 1)
15 km W*
7329
E (Tokyo 2)
40 km W*
3642
F (Kanagawa)
35 km W*
4672