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Devotion towards producing genuine washi paper 「日本本来の紙づくり一筋に」

元紙業試験場 濵田康 Former Paper Making Testing Facility HAMADA Kou

Kochi is widely known for its paper production throughout the ages. Kozo and mitsumata, which are raw materials for paper, were planted in areas where regular farming was difficult due to the steep slopes in mountainous areas of Shikoku. In addition, limestone (the basis for lime) which was used for pulping kozo, was found throughout Kochi. The techniques to fire limestone were widely known when producing Tosa Shikkui (Tosa plaster). While firing, Calcium Oxide (CaO) is produced, and this is known as lime. Once the lime is placed in water, it turns highly alkaline. This water was used to boil down kozo.

On the southern side of Shikoku mountain range, there are many rivers that have blessed the area resourced of water. When producing paper, water is used heavily. This is why Kochi prospered as a paper production area.

写真:美しい仁淀川の流れと木々 写真:処理後の原料を干しているところ

Tengu-Joshi was exported globally as a necessary goods for typewriter printing, was produced in Konotani village located along Niyodo river in Ino town. Although Tengu-Joshi was indispensable for printing, printing technology development was remarkable. It gradually gave up its seat to new technologies and currently Tengu-Joshi is no longer used for any purpose.

Tengu-Joshi required high-uniformity since it was used for printing. If there were any irregularities in the paper, it appeared in the print. Tengu-Joshi used kozo which was troublesome to handle since its fibers were about 10 to 12mm long. It caused “unevenness“ to the paper if the craftsman did not handle them carefully. For this reason, craftsman needed high-quality skills. All craftsman who worked near Niyodo river acquired this advanced technique.

However as mentioned earlier, Tengu-Joshi were no longer in use due to new printing technology, and many highly skilled craftsmen went out of business.

It is no exaggeration to say that reviving a technique that has once diminished are nearly impossible. Moreover, it is not only the techniques, but also the production of kozo that has decreased drastically due to the end of demand. Most kozo are now imported and very few are grown in Japan.

Despite such situation, Kashiki Paper Co., Ltd is the only company that uses Japan grown kozo and protects kozo processing technology. They continue to make “hand-made and machine-made“ kozo paper. Any paper using imported kozo, despite its paper making process, is not a genuine Japanese paper.

I believe that paper made from genuine raw materials in Japan, can only preserve art works, such as ancient Japanese paintings and books, for a long period of time.

Paper made from genuine materials preserve art works without harming them for hundreds of years. In fact, many art works are preserved with Japanese paper and they entertain us still today. If we use imported kozo, troubles may occur over time.

I recommend Kashiki’s paper for those planning to preserve art works for many years. Kashiki’s paper uses Japan grown kozo, and the fiber is handled with the same techniques to produce Tengu-Joshi. Their paper is widely used to restore ancient documents and national treasures.

I hope that Kashiki Paper Co., Ltd will continue its efforts to meet the expectation of their users and preserve Japans genuine paper producing technology by using kozo, gampi and mitsumata, and other raw materials grown in Japan.