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 |
| Mouse/Rat | 1062 | 8.4 | 3 |
| Ox/Cow | 1077 | 8.5 | 2 |
| Tiger | 1045 | 8.3 | 8 |
| Rabbit/Hare | 1028 | 8.2 | 10 |
| Dragon | 1044 | 8.3 | 9 |
| Snake | 1049 | 8.3 | 6 |
| Horse | 995 | 7.9 | 12 |
| Sheep/Goat | 1055 | 8.4 | 4 |
| Monkey | 1049 | 8.3 | 6 |
| Rooster/Cock | 1012 | 8.0 | 11 |
| Dog | 1053 | 8.4 | 5 |
| Wild boar/Pig | 1135 | 9.0 | 1 |
Source is Source is Ministry of Internal Affairs and Communications. 「子年生まれ」と「新成人」の人口
www.stat.go.jp/data/jinsui/topics/topi1220.html
Picture of 12 zodiacs
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