Ministry of Internal Affairs and Communications researched Japanese population by Oriental Zodiac (animal symbols) in 2019. According to it, the people born in the year of Wild boar/Pig are the biggest group among 12 zodiacs. The year of the horse is the smallest group.
Table: Japanese Population by Oriental Zodiac, 2019
|Zodiac||Population (x 10,000)||%||Rank|
Source is Source is Ministry of Internal Affairs and Communications. 「子年生まれ」と「新成人」の人口
Picture of 12 zodiacs