祇園祭のもう一つの祭典。山鉾巡行を支える「作事三方」の人と技　【祇園祭シリーズ〈縄がらみ〉】 Another festival of Gion Matsuri. People and techniques of "Sakuji-sanpo" who support the Yamahoko cruise [Gion Matsuri series ]