Cedar was planted as a national project in Japan.

After Japan's defeat in World War II, Japan aimed to plant cedar trees for national reconstruction and encouraged them to a great extent.

The reason is that growth grows fast and straight and is good for wood

And They planted a lot and grew very well.

Cedar literally took over mountains all over the country.

It was a tree planted for the purpose of reconstruction, and it was good to be able to cover a lot of wood.

And the house built with cedar was strong against the earthquake.

However, imports of good quality and cheap foreign timber were no longer necessary to cut Japanese cedar.

With this reduction in logging, cedar grew nationwide

The problem is that cedar pollen is extremely inexhaustible.

Cedar pollen was spread all over the place, and pollen allergy patients increased tremendously.

About 25% of Japan's population has cedar allergies.

And the second problem is that it grows big and high, but its roots are shallower than other trees.

Japan's land is a volcanic ash soil, and landslides are likely to occur, and thin trees are added to the roots.

It becomes like this. Looking at the pictures of Japan's earthquake damage and landslides, you can see that the mountains have collapsed in this way.

The roots of trees should prevent landslides, but the cedar is a tree that helps landslides.

And the percentage of cedar in the Japanese forest is about 40%, but the cedar does not bear fruit that can be eaten

Small animals that make a tree nest are not suitable for living.

Of course, there are no small animals, no predators eating small animals.

Cedar forests are lush and beautiful when viewed from afar, but it is hard to say that they are healthy ecosystems in close proximity.

Even if they try to replace it with other trees, it is hard to cope with the huge lobby of Japanese pharmaceutical companies and politics.

The story of a cedar allergy medicine comes from a major source of income for a Japanese company.

40% of all trees in Japan are cedar

In the Park Jeong-hee regime, Korea conducted a large-scale forest reforestation campaign. And the tree is a pine tree.

* Arbor Day was also designated at this time.

Deep roots can effectively prevent landslides and have thick forests.

In addition, the forest greening of Korea is an unprecedented success in the world