Higashi-Shinagawa Sea Park, Urban park in Higashi-Shinagawa, Japan.

Higashi-Shinagawa Sea Park is a ward park at the mouth of the Meguro River where it flows into the Tennozu South Canal. The park opened fully on 31 March 2007 after construction began in 1995. Its two sections, in Higashi-Shinagawa 2-chome and 3-chome, are linked by the pedestrian Isle Bridge. Lawns, a whale-shaped slide, a splash stream and fountains fill the grounds, and a boardwalk with flower beds shaped like Dick Bruna characters runs along the canal.

This location was ocean during the Edo Period, spanning the 1600s through 1868, before the area was reclaimed from the sea. The maritime design of the park today reflects this water-based origin.

The park's play equipment includes a whale-shaped slide and a jabujabu water channel with fountains, and the boardwalk along the canal is bordered by flower beds shaped after Miffy and other Dick Bruna characters. A floating pier allows rowing boats to dock, though private use is not permitted and inquiries are required.

The park is open year-round and free. The rooftop of the Higashi-Shinagawa Pump Station is open to the public from 9:00 to 21:00 and offers views of Tennozu Isle, Rainbow Bridge and Odaiba. Access is about 12 minutes on foot from Shinbamba Station on the Keikyu Main Line, or 10 minutes from Tennozu Isle Station on the Rinkai Line and Tokyo Monorail. Toilets and a paid parking lot are available.

The flower beds beside the boardwalk are planted in the shapes of Miffy and other Dick Bruna characters, a detail easy to miss when walking toward the canal. The park also has a floating pier used for rowing boats, though individual use requires an inquiry.