昭和30年 (Showa 30) is 1955 in the Western calendar. Check the age and zodiac below.
Yes. Showa 30 (昭和30年 in Japanese) corresponds to 1955 in the Western calendar.
1955 is the Year of the Goat (未（ひつじ） in Japanese) in the 12-year zodiac cycle. In the older 60-year sexagenary cycle (kanshi) it is 乙未.
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 30 is written 昭和30年 in Japanese. It is also commonly abbreviated S30 — for example on driver's licenses and other government forms.
