Matsumi Park, Urban park in Amakubo, Japan.

Matsumi Park is an urban park with large green spaces centered around a substantial pond stocked with koi fish, alongside walking paths and multiple recreational areas. The layout includes various zones connected by pathways that encourage visitors to explore different sections.

The park was created in 1976 as part of Tsukuba's urban development project to provide public recreational spaces for the community. This initiative reflected the need for modern recreation areas within the expanding city.

The park's name, Matsumi, is written with the characters for pine and see. Its observation tower, nicknamed the "bottle opener tower", was designed by Kisho Kurokawa, the architect behind the Expo Tower of Expo '70 in Osaka. The tower was closed after the 2011 Great East Japan Earthquake and reopened on 19 March 2014.

An observation tower on the grounds offers expansive views across the park and surrounding urban landscape. Visitors can feed the koi in the pond and use the playground facilities, making it suitable for families with children.

The observation tower has an unusual form resembling a bottle opener, making it a recognizable landmark in the cityscape. This distinctive silhouette often surprises visitors who notice its clever architectural design.