平成16年 (Heisei 16) is 2004 in the Western calendar. Check the age and zodiac below.
Yes. Heisei 16 (平成16年 in Japanese) corresponds to 2004 in the Western calendar.
2004 is the Year of the Monkey (申（さる） in Japanese) in the 12-year zodiac cycle. In the older 60-year sexagenary cycle (kanshi) it is 甲申.
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.
Heisei 16 is written 平成16年 in Japanese. It is also commonly abbreviated H16 — for example on driver's licenses and other government forms.
