Quercus acuta

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Japanese evergreen oak
Quercus acuta3.jpg
Quercus acuta2.jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Fagales
Family: Fagaceae
Genus: Quercus
Subgenus: Cyclobalanopsis
Species: Q. acuta
Binomial name
Quercus acuta
Thunb. 1784 not Buch.-Ham. ex Wall. 1829 nor Siebold ex Blume 1851 nor Raf. 1838

Quercus acuta, Japanese evergreen oak, is an oak native to Japan, South Korea, Taiwan, and China's Guizhou Province and Guangdong Province.[2]


Due to its foliage and habitat, it looks rather unlike most other oaks. Quercus acuta is usually bushy and densely domed, reaching a height of 14 meters. The bark is smooth and dark grey. Leaves are dark and glossy above and yellowish beneath. They narrow to a long, finely-rounded tip. The flowers are on a stiff 5 cm catkin.

Heartwood is pale reddish brown to reddish brown. Sapwood is pale yellowish brown with a slightly reddish color.[3]

Common Names[edit]

In Japan, it is called akagashi (赤樫 - あかがし), but is also known by the names oogashi (大樫 - オオガシ) and oobagashi (大葉樫 - オオバガシ).[4] In Korea, it is called buggasinamu (북가시나무).[5]


Like shirakashi (白樫 - しらかし) (Quercus myrsinifolia), whose wood is often called shirokashi outside of Japan, and other related sub-genera, Japanese Evergreen Oak, or akagashi, is a preferred choice for Japanese martial arts practice weapons such as bokken.[6][7] This is due to its uniformly tight grain structure resulting from its continuous growing season. It should not be confused with the oriental or Asian white oak, Quercus aliena.


  1. ^ The Plant List, Quercus acuta Thunb.
  2. ^ "Quercus acuta"Oaks of the World Accessed 8 April 2011.
  3. ^ 木材図鑑 - Picture Book of Woods [1] Accessed 22 March 2017. (Japanese)
  4. ^ TSUYUZAKI Shiro's Plant List - Hokkaido University
  5. ^ 植物和名ー学名インデックス YList - The YList Botanical Name - Scientific Name Index [2] Accessed 22 March 2017. (Japanese)
  6. ^ Zaimoku - Wood for Weapons [3] Accessed 22 March 2017.
  7. ^ James Goedkoop: "Woods for Training Weapons". Aikiweb [4] Accessed 10 November 2012.