Prunus speciosa, commonly known as Oshima cherry, is a deciduous tree native to the coastal forests and volcanic slopes of Izu Ōshima island and the Izu Peninsula on Honshū near Tokyo, Japan. It grows to a typical height of 4–12 meters (13–39 ft) and is known for its ornamental value, particularly during the flowering season. The leaves of the Oshima cherry are 5–10 cm long and 3–6 cm broad, with a double-toothed margin and an acuminate apex, turning to vibrant colors in the fall. The flowers, which bloom in clusters in the spring, are quite showy with their 2.5–4 cm diameter, five white petals, gold stamens, and brown sepals, attracting pollinators and providing a stunning display. The fruit is a small black cherry about 1 cm in diameter, though it is not typically harvested for consumption.

The Oshima cherry is celebrated for its beautiful spring blossoms and is often used in ornamental plantings, including urban settings, gardens, and as a specimen tree. It thrives in full sun and requires medium amounts of water, preferring well-drained soils. While it is not known for having significant disease issues, it can be susceptible to common cherry tree ailments such as bacterial canker and fungal infections. This species is also valued for its longevity and historical significance, as exemplified by an 800-year-old tree on Ōshima island that has been designated a national treasure.CC BY-SA 4.0