head line 船首もやい[機械]; バウライン[機械]〈98F0013:造船用語―船体―外ぎ装〉
例文
it is called sedoka (a poem where the head is repeated ) because the head line (the first line ) is repeated . 頭句（第一句）を再び旋（めぐ）らすことから、旋頭歌と呼ばれる。
therefore , there is a theory presuming that the reasons why the fujishiro suzuki clan was deemed as the head line of the suzuki families of all over japan and why the family name ' suzuki ' had extended in eastern japan at an explosive pace , is because of a booming popularity of yoshitsune , generated in japanese medieval society . このため、藤白鈴木氏が全国の鈴木氏の本家筋と見られたのも東日本で鈴木姓が爆発的に広がったのも、中世日本社会で広く見られた義経人気にあやかったものとみる向きもある。
