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In Japan just after the Pacific war, fuel demand for firewood rose, and the forest became the bald mountain.

It was decided that the people planted the seedling of the cedar in the ruins in prospect of future demand.

The value of the cedar became the speculation object immediately, and then the excessive planting of the cedar began.

However, the attention of the more Japanese market shifted to import wood immediately. As a result, the huge artificial plantation was left.

The artificial plantation of the cedar continued growing up while going to ruin and came to discharge a large quantity of pollen. And a Japanese pollinosis panic starts.