Dietary Reference Intakes for Vitamin B12 (Cyanocobalamin) in Japan (per day)

Males EAR RDA AI
0-5 months - - 0.4 μg
6-11 months - - 0.5 μg
1-2 years 0.7 μg 0.9 μg -
3-5 years 0.8 μg 1 μg -
6-7 years 1 μg 1.3 μg -
8-9 years 1.2 μg 1.5 μg -
10-11 years 1.5 μg 1.8 μg -
12-14 years 1.9 μg 2.3 μg -
15-17 years 2.1 μg 2.5 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 older 2 μg 2.4 μg -
Females EAR RDA AI
0-5 months - - 0.4 μg
6-11 months - - 0.5 μg
1-2 years 0.7 μg 0.9 μg -
3-5 years 0.8 μg 1 μg -
6-7 years 1 μg 1.3 μg -
8-9 years 1.2 μg 1.5 μg -
10-11 years 1.5 μg 1.8 μg -
12-14 years 1.9 μg 2.3 μg -
15-17 years 2.1 μg 2.5 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 older 2 μg 2.4 μg -
Pregnancy EAR RDA AI
12-14 years 2.2 μg 2.7 μg -
15-17 years 2.4 μg 2.9 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 -
Lactation EAR RDA AI
12-14 years 2.6 μg 3.1 μg -
15-17 years 2.8 μg 3.3 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 -
Reference: Dietary Reference Intakes for Japanese. Ministry of Health, Labour and Welfare, Japan, 2015