Hekinan City Rinkai Park, Seaside park in Hama-machi, Japan.

Hekinan City Rinkai Park is a seaside park along Kinuura Bay featuring open grassy areas, walking paths, and shaded rest spots for visitors. The layout includes water play facilities and elevated areas that define different zones throughout the grounds.

The park opened in 1979 on land reclaimed for the Kinuura coastal industrial zone, replacing four beaches lost to that reclamation: Shinsuma, Tamatsuraura, Shinhama-dera and Shin-Akashi. The Kinuura Mammoth Pool opened on 14 July 1979 and closed on 17 August 2003 as visitor numbers fell and facilities aged. After redevelopment the park reopened on 28 March 2009.

The park replaced four beaches lost to the Kinuura coastal industrial zone: Shin-Suma, Tamatsura, Shin-Hamadera and Shin-Akashi. Its name is simply the city's name plus "seaside park". The grounds hold the Hekinan City Rinkai Gymnasium and the Hekinan Sea Aquarium, so a visit can combine sport, marine life and open lawns.

Entry to the park is free; only use of the dome requires a reservation. The slope slide is open 9:00–17:00 from March to October and 9:00–16:00 from November to February, and it is closed over the New Year holidays.

The slope slide at Aoi-no-Yama is open only from March to October, 9:00–17:00, and November to February, 9:00–16:00; it closes over the New Year holidays. Entry to the park is free, but the Dome must be reserved when used exclusively.