昭和21年 (Showa 21) is 1946 in the Western calendar. Check the age and zodiac below.
Yes. Showa 21 (昭和21年 in Japanese) corresponds to 1946 in the Western calendar.
1946 is the Year of the Dog (戌（いぬ） in Japanese) in the 12-year zodiac cycle. In the older 60-year sexagenary cycle (kanshi) it is 丙戌.
It depends on whether they have had their birthday yet this year. The box near the top of this page calculates both possible ages automatically from today's date — the lower number is their age before their birthday, the higher number is their age after.
Showa 21 is written 昭和21年 in Japanese. It is also commonly abbreviated S21 — for example on driver's licenses and other government forms.
