明治元年 (Meiji 1) is 1868 in the Western calendar. Check the age and zodiac below.
Yes. Meiji 1 (明治元年 in Japanese) corresponds to 1868 in the Western calendar.
1868 is the Year of the Dragon (辰(たつ) in Japanese) in the 12-year zodiac cycle. In the older 60-year sexagenary cycle (kanshi) it is 戊辰.
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.
Meiji 1 is written 明治元年 in Japanese, since the first year of a new era is called "gannen" (元年) rather than "明治1年". It is also commonly abbreviated M1 — for example on driver's licenses and other government forms.