大正9年 (Taisho 9) is 1920 in the Western calendar. Check the age and zodiac below.
Yes. Taisho 9 (大正9年 in Japanese) corresponds to 1920 in the Western calendar.
1920 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 庚申.
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.
Taisho 9 is written 大正9年 in Japanese. It is also commonly abbreviated T9 — for example on driver's licenses and other government forms.
