Shōwa-ku is one of the 16 wards of the city of Nagoya in Aichi Prefecture, Japan. As of 1 October 2019, the ward had an estimated population of 110,436 and a population density of 10,095 persons per km². The total area was 10.94 km².

Mizuho is one of the 16 wards of the city of Nagoya in Aichi Prefecture, Japan. As of 1 October 2019, the ward had an estimated population of 107,622 and a population density of 9,592 persons per km². The total area was 11.22 km².