japanDietary Reference Intakes for Vitamin B12(Cyanocobalamin) in Japan

Men

Age AI EAR RDA
0 - 5 months 0.4 μg - -
6 - 11 months 0.6 μg - -
1 - 2 years - 0.8 μg 0.9 μg
3 - 5 years - 0.9 μg 1.1 μg
6 - 7 years - 1.1 μg 1.4 μg
8 - 9 years - 1.3 μg 1.6 μg
10 - 11 years - 1.6 μg 1.9 μg
12 - 14 years - 2 μg 2.4 μg
15 - 17 years - 2 μg 2.4 μg
18 - 29 years - 2 μg 2.4 μg
30 - 49 years - 2 μg 2.4 μg
50 - 69 years - 2 μg 2.4 μg
70 years and abobe - 2 μg 2.4 μg

Women

Age AI EAR RDA
0 - 5 months 0.4 μg - -
6 - 11 months 0.6 μg - -
1 - 2 years - 0.8 μg 0.9 μg
3 - 5 years - 0.9 μg 1.1 μg
6 - 7 years - 1.1 μg 1.4 μg
8 - 9 years - 1.3 μg 1.6 μg
10 - 11 years - 1.6 μg 1.9 μg
12 - 14 years - 2 μg 2.4 μg
15 - 17 years - 2 μg 2.4 μg
18 - 29 years - 2 μg 2.4 μg
30 - 49 years - 2 μg 2.4 μg
50 - 69 years - 2 μg 2.4 μg
70 years and abobe - 2 μg 2.4 μg

Pregnant Women

Age AI EAR RDA
12 - 14 years - 2.3 μg 2.8 μg
15 - 17 years - 2.3 μg 2.8 μg
18 - 29 years - 2.3 μg 2.8 μg
30 - 49 years - 2.3 μg 2.8 μg
50 - 69 years - 2.3 μg 2.8 μg

Lactating Women

Age AI EAR RDA
12 - 14 years - 2.7 μg 3.2 μg
15 - 17 years - 2.7 μg 3.2 μg
18 - 29 years - 2.7 μg 3.2 μg
30 - 49 years - 2.7 μg 3.2 μg
50 - 69 years - 2.7 μg 3.2 μg


Source: Dietary Reference Intakes for Japanese. Ministry of Health, Labour and Welfare, Japan, 2010