Honmoku Sanchō Park, Urban park in Naka-ku, Yokohama, Japan.

Honmoku Sanchō Park is a comprehensive urban park in Naka-ku, Yokohama, opened in 1998 on the site of the former Yokohama Beach Housing Area, a US military housing facility returned in March 1982. It lies on a gentle hilltop and is divided into two sections, a first and a second phase, with open ground and views over Yokohama Port, the Yokohama Landmark Tower skyline, the Bōsō Peninsula, the Tanzawa Mountains and Mount Fuji.

The park occupies land that was the U.S. military's Yokohama Beach Housing Area until it was returned on 31 March 1982. Yokohama City then landscaped the former base as a park, which opened in 1998. It is laid out in two phases, a first and a second section, on separate sites.

The park's name comes from its hilltop site in the Honmoku district, on land returned by the US military in March 1982 after use as the Yokohama Beach Housing Area. The grounds opened in 1998 in two phases, and the separate first and second sections are still distinguished by location within the park.

The park is split into two sections, a first and a second phase, on a gentle hilltop about 34 metres above sea level. It lies roughly 1.2 km south of Yokohama city centre, so it can be combined with a walk through Naka-ku. Paths cross sloping ground, so allow time for the climbs.

From the elevated position, visitors can spot several landmarks including Landmark Tower and Rainbow Bridge on clear days. Mount Fuji is also visible in the distance, making this a vantage point with far-reaching views.