| Rank | Prefectures | Mean Age of Father at 1st Child Birth | Standard Score |
|---|---|---|---|
| Sort | Desc Asc | Desc Asc | Desc Asc |
| 1 | Tokyo | 34.5歳 | 88.21 |
| 2 | Kanagawa | 33.7歳 | 74.36 |
| 3 | Kyoto | 33.2歳 | 65.70 |
| 4 | Saitama | 33.1歳 | 63.97 |
| 5 | Chiba | 33.0歳 | 62.23 |
| 6 | Nara | 32.9歳 | 60.50 |
| 7 | Nagano | 32.8歳 | 58.77 |
| 7 | Osaka | 32.8歳 | 58.77 |
| 9 | Yamanashi | 32.7歳 | 57.04 |
| 9 | Hyogo | 32.7歳 | 57.04 |
| 11 | Shizuoka | 32.6歳 | 55.31 |
| 11 | Aichi | 32.6歳 | 55.31 |
| 13 | Toyama | 32.5歳 | 53.57 |
| 13 | Shiga | 32.5歳 | 53.57 |
| 15 | Hokkaido | 32.4歳 | 51.84 |
| 15 | Tochigi | 32.4歳 | 51.84 |
| 15 | Gunma | 32.4歳 | 51.84 |
| 15 | Ishikawa | 32.4歳 | 51.84 |
| 19 | Miyagi | 32.3歳 | 50.11 |
| 19 | Ibaraki | 32.3歳 | 50.11 |
| 19 | Gifu | 32.3歳 | 50.11 |
| 19 | Fukuoka | 32.3歳 | 50.11 |
| 23 | Akita | 32.2歳 | 48.38 |
| 23 | Niigata | 32.2歳 | 48.38 |
| 23 | Mie | 32.2歳 | 48.38 |
| 23 | Kochi | 32.2歳 | 48.38 |
| 27 | Aomori | 32.1歳 | 46.65 |
| 27 | Yamagata | 32.1歳 | 46.65 |
| 27 | Hiroshima | 32.1歳 | 46.65 |
| 27 | Kagawa | 32.1歳 | 46.65 |
| 31 | Wakayama | 32.0歳 | 44.91 |
| 31 | Tottori | 32.0歳 | 44.91 |
| 31 | Shimane | 32.0歳 | 44.91 |
| 34 | Fukui | 31.9歳 | 43.18 |
| 34 | Okayama | 31.9歳 | 43.18 |
| 34 | Tokushima | 31.9歳 | 43.18 |
| 34 | Ehime | 31.9歳 | 43.18 |
| 34 | Kagoshima | 31.9歳 | 43.18 |
| 39 | Iwate | 31.8歳 | 41.45 |
| 39 | Oita | 31.8歳 | 41.45 |
| 39 | Okinawa | 31.8歳 | 41.45 |
| 42 | Kumamoto | 31.7歳 | 39.72 |
| 43 | Yamaguchi | 31.6歳 | 37.99 |
| 43 | Nagasaki | 31.6歳 | 37.99 |
| 45 | Fukushima | 31.5歳 | 36.25 |
| 45 | Saga | 31.5歳 | 36.25 |
| 47 | Miyazaki | 31.4歳 | 34.52 |
| Japan | 32.8歳 |