
Originally Posted by
Yomiuri
Yakushima island, home to the Jomon Sugi (Jomon Cedar) and 46 mountains more than 1,000 meters high, lies 60 kilometers south of Satamisaki cape, Kagoshima Prefecture, the southernmost tip of Kyushu.
Because of its large number of peaks, the island is known as the Alps of the Sea. Among these mountains is Miyanouradake, which at 1,935 meters is the highest peak in the Kyushu region.
The Black Current flows to the southeast of the island, sending warm humid air wafting up into the mountains, resulting in a rainfall that keeps it lush with vegetation.
While the 130-kilometer coastline and other low-lying areas receive an annual average rainfall of 4,000 millimeters, mountainous areas receive 8,000-10,000 millimeters--three times the amount that falls on Tokyo in an average year. In fact, the rainfall on Yakushima is the highest among monitoring points operated by the Meteorological Agency.
Yakushima, which has an area of 500 square kilometers, is justly famous for its cedars. Trees 1,000 years old or more are called Yakusugi cedars by the islanders, while younger trees are referred to as kosugi. Besides the Jomon Cedar, about 40 other Yakusugi trees have been given names.
The longevity of the cedars on Yakushima is far in excess of the normal life span of a cedar, which is about 500 years. So why are so many cedars on Yakushima more than 1,000 years old?
Hiroshi Hata, a local guide, has the following theory: "Yakushima is a mass of granite covered with a thin layer of soil. As the soil is sparse, the cedars do not receive enough nutrients. Therefore, their growth is extremely slow, resulting in dense growth rings. This means they contain a great deal of resin, and as a result they resist decay better and live longer. In short, a sparse diet is the key for a long life."
The Jomon Cedar is at an elevation of 1,300 meters. To reach it, visitors have to trek through the mountains for five or six hours. This means that those who want to gaze at the tree should plan on a day trip starting early in the morning.
But the journey is well worth it. The Jomon Cedar is 30 meters tall and the circumference around its bole is 43 meters.
The heartwood of the tree, the oldest part of the tree at the core of the trunk, is rotten and hollow, so it is impossible to accurately determine the age of the tree. Estimates vary from 2,170 to 7,200 years.
Those who have made the journey usually stand transfixed before the tree, trying to imagine the immense length of time it has existed.