Tatsuta Bridge, Road bridge in Aisai City, Japan.

Tatsuta Bridge (立田大橋) is a girder bridge on the Aichi–Gifu–Mie Prefectural Route 125 Saya-Tado Line, spanning the Kiso River between Matsuda and Fukuhara in Tatsuta-cho, Aisai, Aichi Prefecture. It is 966 m long and 12 m wide, with one lane in each direction and sidewalks on both sides. Together with the Nagara River Bridge and the Yushima Bridge over the Ibi River, it links the three prefectures.

The bridge opened in 1984 as a key connection for the three prefectures of Aichi, Gifu, and Mie. It was developed as a regional transportation project to improve accessibility across the river.

The bridge links to Kisosansen Park, a gathering place where people from the region come together for community events and leisure activities. Local families use the spaces on both sides of the river for celebrations and daily recreation.

The right bank, on the west side, holds the Tokai Hiroba park with lawns, sports grounds, a marathon course, a barbecue area and 520 free parking spaces; it opened in 1990. The left bank, on the east side, has a day-camp site with 30 car pitches, a multipurpose ground and a park golf course, opened in 2009. Pedestrians and cyclists on the bridge's two footways can descend directly to the left-bank embankment road, but fishing from the footways is prohibited.

Tatsuta Bridge is the only bridge over the Kiso River with both banks in Aichi Prefecture, because the prefectural border with Gifu runs along the Naga River. The river here is brackish, and at low tide a sandy island sometimes emerges beneath the span, where Yamato clams are harvested.