曜変天目の道The Road of Yohen Tenmoku

人のターニングポイントは、あらかじめ用意されているのかもしれない。古くからの窯業地として知られる愛知県瀬戸市の陶工、九代長江惣吉も、運命から逃れられない人生を歩んでいる人だろう。惣吉は、今でこそ、中国の南宋時代に生まれた曜変天目の再現の第一人者として知られる。茶碗の中にある星がきらめく宇宙。日本にだけ、完全な器が三碗残り、ともに国宝に指定されているたぐいまれな器である。再現という到達が容易ではない世界に身も心も奪われた父の八代が足を踏み込み始めたが、最初からレールが敷かれているわけではなった。

九代が三十代のときの出来事だ。父は、ある日突然、代々続いてきた染めもの磁器の家業をやめると宣言。従業員も解雇してしまった。惣吉は反目し、家を離れ、別の仕事に就くが、父は急死する。母の嘆きは並みたいていではなく、家に戻った惣吉は、焼き物の仕事をやるうち、父と同じ、曜変天目の再現の道へと足を踏み入れてしまう。父が没頭したこと。母が生きるための精神の支柱だったといえるのだが、始めは好きが高じて入ったのではなかった。

研究資料は何も残されていない。ゼロからの取り組みである。曜変天目の故郷である中国福建省の建窯の古窯跡に四十回以上も赴き、現地を調査。広大な窯跡から、鈍い光彩のある陶片を見つけ、蛍石の砕石があるのに気づく。これが、幻の焼き物を成り立たせた秘密かもしれない。そう考え、二十年の歳月を費やし、窯の焼成だけで再現することにひたすら身を投じてきた。そうして、窯焼きのある時点で、蛍石の砕石紛を投じると、フッ化水素ガスが発生し、化学変化で星のような斑紋と光彩が定着するメカニズムが分かった。タマムシの羽のような構造色で、半永久的に輝きは失われることはない。

学会で化学分析の成果についての発表も積極的にしている。再現に使う土も建窯から八十トン持ってきており、「再現というからには土も釉薬も現地のもので」とこだわる。まっすぐな人だ。父のようにとりつかれたような部分がないからこそ、冷静に再現を進められる心の余裕もあると本人もいう。ただ、曜変天目がある程度再現できたのは、これまで二碗のみ。確率でいうと、二万碗に一碗という。今、惣吉の手元にあるのは、二〇〇六年にできたものだ。それ以降、焼成の条件が整わないのか、なかなか窯からは生まれてこない。「何か足らないものがあるのか。焼き物は化学だから」と、分析に余念がない日々を送る。

けれども、「作家としては、再現は、あくまで再現」と言い切る。研究過程で、オーロラや虹のようなまばゆい光彩を放つ「曜々盞」という天目を独自の作品として生みだすことに成功したのも、その思いからだ。どこかで、再現の歩みを講演すれば、淡々と語るが、日の目を浴びだしたのは最近のことである。

これまでも曜変天目を再現したと広言した作家は何人もいたが、南宋時代と技法も違えば、肝心の土さえも異なる。それが、果たして再現といえるのか。忸怩たる思いを募らせてきた辛い時期もある。父なき後、投じた二十数年は、独りの道。かつては大勢の人が働いていた、広い作業場で、黙々と仕事に励む。中国では、曜変天目再現の先人として歓迎される。最初は、道さえも、何も見えなかった荒野に足を踏み入れたが、今は後にも先にも道がくっきりと見える。目指すのは、静嘉堂文庫が所蔵する曜変天目、通称「稲葉天目」のまばゆい銀河だという。

 

黒谷誠仁(くろたに・まさひと) 玄羅(げんら)

One’s turning point may be decided beforehand. The ninth generation potter Sokichi Nagae in Seto City of Aichi Prefecture, which is known traditionally as a ceramic making region, is also someone whose fate has been predetermined. Sokichi is now known as the pioneer of the re-creation of the Yohen Tenmoku tea bowl, which dates from the Chinese Southern Song Dynasty. In the universe within the bowl, stars are shining. This is an extraordinary bowl – in the whole world only three perfect bowls remain, all of them in Japan and all three designated as national treasures. It was his father, the eighth generation potter, who started to work on the hard to achieve re-creation of this bowl. However Sokichi’s destiny was not laid out from the beginning.

It was when Sokichi was in his 30s. One day, his father suddenly announced that he would quit the long-running family business of making ceramic wares. He then discharged all the employees. Sokichi became at variance with his father, and left home for a different job. However his father died suddenly. His mother was sunk in grief. Sokichi went back to his home and to the family business of making ceramics. While working, just like his father, Sokichi also fell into the pathway of aiming to recreate the Yohen Tenmoku. This was something to which his father was once devoted. But the intention for Sokichi was to support his mother mentally, not because he was passionate about it.

No research materials were left. Sokichi had to begin from scratch.
He has visited the Jian ware kiln remains in Fujian Province of China – the home of Yohen Tenmoku – over forty times, and conducted research there. Looking at a ceramic fragment with a dull shine that was found at the vast kiln remains, he realised that there was a broken piece of fluorite. He thought that this might be the secret to making such a special creation possible, and since then for twenty years, has been devoted to recreating Yohen Tenmoku through only kiln fire. Sokichi then discovered that adding the powder of a piece of fluorite at a certain point during the firing process generates gaseous hydrogen fluoride, creating star-looking patches and lustre through a chemical change. It is the structural colour of the wing of Buprestidae (jewel beetle), and its shine will never fade.

Sokichi actively presents the result of his chemical analysis at academic conferences. Eighty tonnes of soil were brought from the Jian ware region for the re-creation of the Yohen Tenmoku. ‘When we say re-creation, we should strictly use genuine soil and glaze.’ Sokichi is adamant. According to him, since he is not like his father who was almost possessed, he has a confidence to calmly focus on the re-creation work. But so far, he has only managed to come close to recreating Yohen Tenmoku on two occasions. This gives a probability of one in twenty thousand bowls. The one that Sokichi currently holds was made in 2006. Since then, perhaps something has not quite been perfect for firing, as none have been produced in the kiln. ‘There may be something lacking. Making ceramics is a chemistry.’ Sokichi never stops his research.

Sokichi, however, also decisively says ‘as a pottery artist, a re-creation is after all a re-creation’. This feeling of his became the basis for success in creating an original work ‘Yoyosan,’ which is radiant like an aurora or rainbow. When Sokichi is invited to talk about his journey of re-creation, he speaks about it calmly. It is only recently that he and his work have started to attract attention.

There have been many artists so far who declare that they managed to recreate Yohen Tenmoku, but their technique is different from the Chinese Southern Song Dynasty – as is the soil, the central material. Can we really call this ‘re-creation’? Sokichi had a difficult time of self-criticism to go through also. Since his father’s death, Sokichi has been on his own for over twenty years. He focuses on his work in a large studio space where many people used to be working. In China, Sokichi is welcomed as a pioneer of re-creation of Yohen Tenmoku. In the beginning, he stepped into a wilderness without a route, but now he sees clear paths before and after him. The target is the brilliant galaxy of Yohen Tenmoku, which is in a collection of Seikado Bunko Art Museum and is the so-called ‘Inaba Tenmoku’.

 

Masathito Kurotani, Director, genra

玄羅アート genra art

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