Terrarium House exhibition greenhouse, Nagakubo Park Urban Greenery Botanical Garden (長久保公園都市緑化植物園 展示温室「テラリウムハウス」)

Nagakubo Park, a district park (地区公園) of about 4.4 hectares in the Tsujidō-Taiheidai area, opened on 1 April 1989 according to a 2025 municipal document. A presentation by the Fujisawa urban development foundation says, by contrast, that a "greenery promotion centre" had opened there on a provisional basis in 1975 and that the present form dates from 1993. Japanese Wikipedia describes the place as a space for contact with nature laid out while the city was urbanising, and as a base for spreading urban greenery; since April 2023 it has also served as the city's "biodiversity centre".

The Midori no sōdanjo building, which houses the greenhouse, an exhibition hall, a training room, a library and an advice desk, was about thirty-five years old in 2025. The city judges it ageing and poorly suited to its use (a minimal nursing room, rooms with no continuity between them) and plans to rebuild it under its fourth public-facilities redevelopment plan. The file presented to the council in June 2026 announces that the new building will enter service from fiscal 2028, with the old one demolished; the new single-storey timber-and-steel building would measure about 667 m². The estimated cost of the whole project, including the new building (about 580 million yen), the demolition of the old one and site works, is about 670 million yen.

The park's official facilities page carries, next to the greenhouse, a note reading "renovation in progress" dated May 2023, with no further detail, while the city's page, updated on 30 October 2025, still presents the greenhouse.

The greenhouse is a room within the Midori no sōdanjo building: a two-storey steel structure of 693.9 m² floor area, standing opposite the main entrance. A local blog places the greenhouse on the left, inside the building. The 2026 municipal plan gives it 124.10 m².

In the photograph captioned "exhibition greenhouse" on the Shonan Kamafuchi blog, the walls and roof are made of large glass panes with white glazing bars, with orchids and other potted plants. "Terrarium House" is the name used by the park's official site. In the rebuilding project the new greenhouse, of 105.26 m², would be placed parallel to the flower bed of the main promenade, so that it can be seen both from the bed and from inside the building.

The city's page announces tropical foliage plants and flowering trees; the official site speaks of tropical plants, desert plants and carnivorous plants "of singular appearance". A local blog (article of 2021, updated in 2023) mentions orchids and banana trees in the room and shows flowering orchids. The shows in the neighbouring hall (western orchids, bonsai, mountain plants, satsuki azaleas) extend the theme, and the volunteer group "Nagakubo Green Supporters" has an orchid section.

Outdoors, the park grows a herb garden of about a hundred varieties, a rose garden of about fifty species, a seasonal flower bed along the promenade, an iris pond and a water-lily pond, with cherry trees around the lawn and a hedge maze. These features make the park more a neighbourhood botanical garden than a greenhouse destination.

The greenhouse is inside the reception building, opposite the main entrance; at 124 m² it can be seen quickly. The park is a fifteen-minute walk from Honkugenuma station (Odakyū Enoshima line) or three minutes from the "Nagakubo" bus stop, according to Japanese Wikipedia.

Around the greenhouse are the hedge maze, the rose garden, the herb garden across the road, the pond where the kingfisher, the city's bird, sometimes appears, and a viewpoint from which Enoshima can be seen in clear weather, according to a blog. Before visiting it is worth checking the greenhouse's state: the building is due to be rebuilt, although the trade press says that the old building's functions will be kept running during the works.