The garden was originally constructed by the wealthy merchant Iwafune Zenbei as a summer estate.
It was opened to the public as a city park in 1954 after being donated to Hakodate City.
The name 'Kosetsuen' translates to 'a park to admire the scenery,' reflecting the intent behind its design.
The garden is a host site for the annual Hakodate Momijiyama Festival, held specifically to view turning maples.
It contains over 150 varieties of trees, with Japanese maples serving as the dominant species for autumn color.
The site includes a designated 'Entei' or garden teahouse, which is a rare example of preserved residential architecture from the Meiji period in Hakodate.
The water features in the garden are gravity-fed and integrated into the natural topography of the sloping terrain.
Hakodate Kosetsuen is the only traditional Japanese-style garden in Hakodate, originally established as a private villa retreat for a local merchant in 1898. It covers approximately 4.2 hectares and serves as the primary component of Miharashi Park. The garden is specifically designed to highlight seasonal shifts, featuring an extensive collection of maple trees that turn vibrant red during the autumn months. It contains historical structures, including a teahouse that reflects Meiji-era architectural influence. The landscape utilizes borrowed scenery techniques to incorporate the surrounding hills. During the spring, the grounds feature cherry blossoms, though the garden is most frequently associated with the fall foliage festival. It remains a municipally managed historical asset preserved for its cultural contribution to the Miharashicho district.
The central arched wooden bridge overlooking the pond reflecting the maple trees.
Visit during the peak of the autumn foliage season, typically late October, when the park hosts evening light-up events.
Explore the winding paths throughout the back portion of the park to find quieter, less crowded viewpoints of the maples.
Wear comfortable walking shoes, as the park features uneven ground and slight inclines.
Do not expect a large, expansive forest; it is a compact, curated garden setting, so manage expectations for total size.
The park is publicly accessible year-round, though specific structures like the teahouse may have limited interior access depending on maintenance schedules.
Maintain a quiet volume; do not enter restricted areas marked by ropes; do not pick flowers or foliage.
