Honmoku Shimin Kōen, Public park in Honmoku, Japan

Honmoku Shimin Kōen is a public park with multiple levels, grassy areas, wooded knolls, and connected pools containing aquatic plants with dragonflies visible along cliff edges. The grounds feature tennis courts, a summer swimming pool, and accessible parking for disabled visitors.

The park opened in 1969 on land reclaimed from the sea along the Honmoku coast. Its neighbour Sankeien garden lies directly to the north, and the Yokohama City Hasshōden museum, built in 1933 by politician Adachi Kenzō, stands on the hill above. The municipal pool beside the park opened the same year, 1969.

The Shanghai–Yokohama Friendship Garden inside the park was donated by Shanghai in 1989 to mark 15 years of sister-city ties. It follows the Jiangnan garden style of Shanghai's Yu Garden, with a pond where lotus blooms in summer and the Jiǔqū Bridge, Húxīn Pavilion and Yùlán Hall set over the water. After deterioration closed the buildings, renovation finished and the garden reopened on 26 July 2021.

Visitors can use tennis facilities and a swimming pool available during warmer months. The infrastructure provides ample parking and pathways across different levels, making navigation straightforward.

The D51 516 steam locomotive displayed here once worked from the Takashima freight station on the former Japanese National Railways Takashima Line. Its tender now serves as a water tank for the sprinklers of the neighbouring sports park, with wire mesh and barbed wire fixed on top.