Ibaraki Botanical Garden, Botanical garden in Naka, Japan.

The Ibaraki Botanical Garden is a 12-hectare botanical garden and arboretum at 4589 To, Naka, Ibaraki. It holds a rose garden, aquatic plant garden, rock garden, collections of camellias, conifers and tropical fruit trees, and a tropical greenhouse. The grounds contain about 600 plant species, including 240 tropical species, and roughly 360 types of trees.

The garden opened in 1981 as a dedicated space for plant research and conservation in the Ibaraki region. This founding launched a local effort to systematically preserve plant species and their habitats.

The garden's name changed with its 2025 reopening as The Botanical Resort Rinne, a resort whose name combines the characters for forest and sound. The former tropical plant house became the Vanilla Dome Cafe, built around a vanilla theme, and the grounds now include lodging and hot-spring bathing facilities alongside the plant collections.

The garden is easiest to reach by bus from JR Mito Station or by car via the Joban Expressway. The paths are well-marked and there is plenty of room for walking and getting your bearings.

The garden houses around 240 tropical plant varieties that would not normally survive in this climate, showing the breadth of the collection. At the same time, the grounds provide habitat for about 70 bird species that add life to your visit.