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Tree and health

There was a time when the owner, who uses the structural and interior materials we deliver, said, "I am in better shape than before, and I am able to live comfortably and comfortably." The owner spends a lot of time at home with his children.

It was a great honor for us involved in architecture to hear the word "safety".

​ So I did a little research on Nara trees and "safety".


大黒柱施工例 子ども抱き着き写真.jpg

A comparative experiment conducted by Nara Prefecture found that Sugi and Hinoki wood from Nara and Yoshino, which are known as high-class building materials, have a higher effect of suppressing mites and Escherichia than wood produced in other prefectures. The effect of "Nara no Ki" has been scientifically proven for the first time, and the prefecture recommends its use in childcare facilities and nursing homes, and will utilize it for public relations.

Focusing on the health benefits of trees, the prefecture asked a specialized agency last year to investigate five items: mold, Escherichia coli, mites, influenza virus, and ultraviolet rays. 100-year-old Sugi and cypress wood grown in Kawakami Village, Japan's oldest artificial forest "Yoshino Forestry Area", and 30-40 year old Sugi and cypress wood from other prefectures are used as boards, wood flour, etc. It was processed into essential oil and the growth and suppression of mold and bacteria were compared.

As a result, when mold was planted on an agar medium mixed with essential oil, the prefecture-produced Sugi wood completely blocked the growth of mold for 7 days. Mold grew on Sugi lumber from other prefectures. On the other hand, hinoki cypress wood grew slightly in both prefectures and other prefectures. In the E. coli experiment, only the prefecture-produced Sugi lumber completely blocked the growth.

In addition, the invasion rate of mites, which was 96% for general carpets, is now 0% for filter papers containing essential oils of Sugi and cypress from the prefecture. Ultraviolet rays are said to have almost completely shut out any wooden planks. On the other hand, in an experiment in which wood powder was mixed with influenza virus, cypress was more effective in weakening infectivity than sugi.

The prefecture expects that "using sugi and cypress lumber produced in the prefecture for the interior of buildings and cutting boards may suppress allergic diseases and food poisoning." However, it is unclear why Nara trees have an excellent effect, and the prefecture says that it will conduct further comparative experiments in the future.

Professor Kozo Kanayama (Wood Utilization) of Kyoto University, who was involved in the verification of the experiment, said, "If research progresses and the mechanism of the tree in Nara is elucidated, in the future it will be a way to grow a" healthy tree ". You can also step on it. "

(Source: Sankei BIZ 2015/5/25  Mold and tick suppression effect on Yoshino's "Sugi" and "Hinoki" ... Clearly in comparative experiments Nara Prefecture)

The details of the comparative experiment are from the comparative experiment conducted by Nara Prefecture (Nara Tree Brand Division HP)

I would like to ask you here that there are various times in your life, such as time in the office, time in the bedroom, time in the living room, time in school, time in the facility, and so on.

How long do you have to be surrounded by the gentle warmth of the trees?


We regularly hold "Forestry Experience Events" and "Morisho Tour" to make you feel closer to the forestry industry. A total of more than 1000 people have seen and touched the forest.

As a forestry worker, I hope that you will feel the forest as close as possible and help you to live a rich life.

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