Toyokawa (豊川市, Toyokawa-shi) is a city in the eastern part of Aichi Prefecture, Japan.

Despite the expansive nature of the city's urban areas, the central functions are dispersed among several stations in different districts.

Consequently, large-scale commercial facilities and urban development lagged behind, leading to a prolonged situation where the purchasing population flowed to neighboring cities.

Entering the Heisei era, efforts were made to open medium-sized commercial facilities in the Suwa District and its vicinity.

Simultaneously, roadside stores concentrated around Toyokawa IC and the southern part of Nagadoshi, near the border with Toyohashi City, without a clear shift in the decentralization trend.

In 1939 the massive Toyokawa Naval Arsenal was established, one of the largest producers of machine guns, aviation ordnance and ammunition in the Empire of Japan.

It also had sections that produced military-issue katana, bayonets, and glass lenses for use in cameras, binoculars, and similar equipment.

Toyokawa has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 30 members.

In terms of national politics, the city is part of Aichi District 8 of the lower house of the Diet of Japan.