平成18年 (Heisei 18) is 2006 in the Western calendar. Check the age and zodiac below.
Yes. Heisei 18 (平成18年 in Japanese) corresponds to 2006 in the Western calendar.
2006 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.
Heisei 18 is written 平成18年 in Japanese. It is also commonly abbreviated H18 — for example on driver's licenses and other government forms.
