And the reason is unknown why wards were established in the low population cities such as Akamagaseki Ward (20,966 people) and Sapporo Ward (2,678 people) while no wards were done in the cities with a relatively large population such as Toyama, Kagoshima, Fukui and Tokushima.
なお、赤間関区20,966人、札幌区2,678人など本籍人口が少ない都市に区が設置され、富山・鹿児島・福井・徳島等の本籍人口が比較的多い都市に区が設置されなかった経緯については不明である。