昭和4年 (Showa 4) is 1929 in the Western calendar. Check the age and zodiac below.
Yes. Showa 4 (昭和4年 in Japanese) corresponds to 1929 in the Western calendar.
1929 is the Year of the Snake (巳（み） in Japanese) in the 12-year zodiac cycle. In the older 60-year sexagenary cycle (kanshi) it is 己巳.
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 4 is written 昭和4年 in Japanese. It is also commonly abbreviated S4 — for example on driver's licenses and other government forms.
