Kuromatsu (クロマツ, 黒松), Japanese black pine Omatsu (オマツ, 雄松) ↔ Mematsu (メマツ, 雌松)
Lifeform: evergreen tall tree, occasionally ≈ 40 m in height
Distribution: Japan except Hokkaido. The trees are originally transplanted in Hokkaido. Some of them are now naturally regenerated.
Habitat: transplanted near seacoasts for sabo (erosion control) → tolerant to salt
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[1] a sapling near the Nishiyama craters at the foot of Mount Usu, September 9 2009. [2] at the forecourt of Usujiri Fisheries Station, Hokkaido University, on June 20 2014. [3] in Miyajima Island, Seto Inland Sea, Chugoku District, western Japan, on March 16 2014. [4] at Y-kun Crater in Kompira Craters of Mount Usu on July 14 2015.
The pine is named "300-year Pine" becuase it was planted in 1709, about 300 years ago, when the sixth shogun, Ienobu Tokugawa repaired the garden. Its majestic form, praising the great work, is reminiscent of the old days. It is one of the largest black pines in Tokyo.
When the weather turns cold, in order to winter, harmful insects at the branches of a tree will get down to the ground through the trunk.
In order to catch and remove them, we carry out komo-maki (straw mat wrapping), a work of wrapping komo (straw mat) around the tree trunk of a tree.
We use some straw ropes to tie up the komo wrapped around the trunk at two places, i.e., the upper and the lower part. The upper part is tied a bit loosely while the lower part is tied tightly. Becuase the insects will not go down to the ground but instead will stay at the straw mat to winter.
Before the spring comes and the insects start to move, we detach komo from the tree and then burn it up. Komo is wrapped around the trunks at the end of October, around sõkõ (frost descent) solar term. Detachment is carried out from the beginning of February through the middle of the month, around risshun (start of spring) solar term.