Otowa, Aichi  On January 15, 2008, Otowa, along with the town of Mito (also from Hoi District), was merged into the expanded city of Toyokawa. As of November 1, 2007 (the last census data prior to the merger), the town had an estimated population of 8,870 and a population density of 299.15 persons per km². The total area was 29.65 km².