And ironically, the aoso in Echigo Province is said to have gotten the finishing stroke during the Genroku era (A.D. 1688 - 1704) of the Edo period in the loss of the competition over aoso with the Aizu domain and the Yonezawa domain, into which the cultivation techniques of aoso were introduced when the Uesugi clan had its territory changed.
そして皮肉なことに越後の青苧が江戸時代元禄年間に没落した最大の理由は上杉氏の移封とともに青苧栽培技術が伝来された会津藩・米沢藩両藩産の青苧との競争に敗北した影響が大きかったという。