Environmental Impact And Countermeasures To
Forest Decline In Japan
Author(s)
O. Hanada, Y. Yamada & M. Takezawa
Abstract
Type of trees vary over different localities in Japan but the Japanese cedar and
the Japanese cypress cover a wide area. The Japanese cedar and the Japanese
cypress were specifically planted from the 1950s.
The Japanese cedar and the Japanese cypress have been growing thickly in
recent times as a result of not thinning out the forest. A relevant factor in this
lack of forest tending is the large quantity of cheap lumber imported from some
foreign countries. As a result, a large quantity of pollen is scattered over the
country and many cases of allergy to cedar pollen are reported. The rate of
allergy to cedar pollen is gradually increasing every year and the number of
people suffering is about 10,000,000 in Japan at present. Bronchial asthma has
also taken a turn for the worse due to allergy to cedar pollen. The Japanese cedar
and the Japanese cypress will also seek less crowded areas or will produce a
greater quantity of seeds when blossoming, which will contribute to pollen
allergies. Potential countermeasures are as follows: (1) Adequate thinning out of
forests; (2) a change in the type of tree planted from the cedar and cypress to
other trees to reduce the amount of airborne pollen; and (3) an increase in the
number of trees with fruits or nuts.
Keywords: forest, forestry, Japanese cedar, Japanese cypress, allergy, fruit, nut.
1 Introduction
Recently, cases of allergy to cedar pollen and damage caused to farms by wild
animals is increasing because of a lack of forest tending in Japan. It is generally
accepted that cedar pollen and exhaust gases contribute to allergies in Japan.
Keywords
forest, forestry, Japanese cedar, Japanese cypress, allergy, fruit, nut.
Related Book
Other papers in this volume
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