2023 Fiscal Year Final Research Report

A preliminary study of the cultivation and mucus preservation of plants "tororo-aoi" and "noriutsugi" producing mucus used for Japanese paper-making

Research Project

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Project/Area Number	20K01105
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 03060:Cultural assets study-related
Research Institution	Fukui National College of Technology
Principal Investigator	Shimada Chika 福井工業高等専門学校, 電子情報工学科, 特命准教授 (20345599)
Co-Investigator(Kenkyū-buntansha)	小越咲子福井工業高等専門学校, 電子情報工学科, 教授 (70581180) 小越康宏福井大学, 学術研究院工学系部門, 准教授 (80299809)
Project Period (FY)	2020-04-01 – 2024-03-31
Keywords	トロロアオイ / 和紙抄造原料 / ネリ / 根抽出液 / 栽培条件 / 粘弾性 / 簡易なネリ評価法
Outline of Final Research Achievements	The main purposes of this study, which focused on tororo-aoi used for Japanese paper-making, were an establishment of the cultivation conditions and the evaluation methods of its mucus extracted from the root. The main results of the study were (a) two different external forms were found under　one plant name, tororo-aoi. Echizen Washi people had distinguished these two forms and the real "tororo-aoi" came from only ones grown in Ibaragi prefecture.(b) During the cultivation, fertilization, companion plants, bud picking, amount of watering, akadamatsuchi mixed with pumice didn't affect the time passing through a funnel (a simple evaluation method for the root extraction). (c) Comparing of the vicinity and the elasticity of the root extraction taken from the plants grown in Ibaragi and Fukui prefectures, the former was less likely to deteriorate. These results were presented at nine academic conferences, a newspaper article, and an education program related to cultural properties.
Free Research Field	文化財科学
Academic Significance and Societal Importance of the Research Achievements	本研究成果の学術的意義は、日本文化や世界の文化財修復に不可欠な和紙の永続的な生産を支援するため、栽培される植物、栽培条件、栽培によって得られた材料の評価方法の解明に貢献できたことである。誠実さ、熱意を伴って確かな技術で作られた文化財は、実物を手に取る、又は間近でみることで、それが国の誇りであることが実感できる。この研究成果を通して和紙や日本文化に興味を持つ人を増やすこと、それが本研究の社会的意義である。