. . "Yusaku" . "1882" . . "横山" . "ユウサク ヨコヤマ" . "Yūsaku Yokoyama" . "Yokoyama" . "ユウサク" . "ヨコヤマ" . "1929" . . "有策" . "Yusaku Yokoyama" . "有策 横山"@ja-JP . "Yūsaku" . .