| Shakujii River | |
| Source1 Location: | Kodaira, Tokyo |
| Mouth Location: | Sumida River, Kita-ku, Tokyo |
| Subdivision Type1: | Country |
| Length: | 25.2km (15.7miles) |
The is a river which flows through the northwest quadrant of central Tokyo, Japan. It is one of the tributaries of the Arakawa River. With a total length of 25.2km (15.7miles) and a drainage basin of 61.6km2, it is categorized as a Class A river by the Japanese government.
It springs up in Koganei Park in the district of Hana-koganei-minami-chō, in the city of Kodaira. It then flows in an easterly direction through the city of Nishitōkyō. Next, it continues through the special wards of Tokyo of Nerima-ku, Itabashi-ku and Kita-ku. At Horifune, Kita-ku, it empties into the Sumida River.
The Shakujii River has 66[1] bridges over its upstream portion. There are 62[2] over its middle basin. And there are 66[3] bridges over its downstream portion. This makes for a total of 194 bridges.
The famous wooden plank bridge for which Itabashi-ku is named crossed the Shakujii at . The bridge has now been replaced by a modern ferroconcrete one called Ita Bridge.
Confluence with Sumida River: 35.7579°N 139.7478°W