1912 in the Japanese calendar: Meiji 45 and Taishō 1
大正元年
Meiji 45 until 30 July 1912, then Taishō 1 · written M45 or T1 on forms
Taishōera1year of the era
1912 belongs to two eras
Until 30 July 1912 it was 明治45年 (Meiji 45). From 30 July 1912 it became 大正元年 (Taishō 1). A document dated in this year must use the era that was current on that day — and the first year of a new era is written 元年, gannen, never 1年.
Other years
Every year of the Taishō era → · How the Japanese calendar works, and every year 1868–2050