Legend of the Heir's Island Crossing

...The legend of Oniichi Hōgan is also told in the Otogi-zōshi "Hangan-tōwa" (one name, "Oniichi Hōgan"), "Minazuru", and the Noh play "Tankai", and includes variant versions such as the name of Hōgan's daughter being Minazuruhime. A similar legend is the legend of the heir's island crossing, in which Yoshitsune crosses an island called Chishima or Ezogashima while in Oshu, and steals a secret military strategy called "Dainichi no ho" from the king of demons with the help of the king's daughter (Otogi-zōshi "Hiroshima crossing"). If this legendary island becomes hell, it becomes the legend of Ushiwakamaru's hell pilgrimage, in which Ushiwakamaru prays to Bishamon of Kurama, arrives at the palace of Daitengu, begs to travel through hell, and meets his late father Yoshitomo, who is now Dainichi Nyorai.

*Some of the terminology used in the "Legend of the Heir's Island" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…鬼一法眼伝説は他に御伽草子《判官都話》(一名，《鬼一法眼》)，《皆鶴》，能の《湛海》にも伝え，法眼の娘の名を皆鶴姫とするなど，異伝を含んでいる。これに似た伝説に御曹子島渡り伝説があり，奥州滞在中に義経は千島とも蝦夷（えぞ）ガ島とも称される島に渡り，鬼の大王の秘蔵する〈大日の法〉と名づけた兵法を大王の娘の手引きで盗み出すというものである(御伽草子《御曹子島渡り》)。この伝説の島が地獄となると牛若丸地獄巡り伝説となるが，これは牛若丸が鞍馬の毘沙門（びしやもん）に祈って，大天狗の内裏に至り，懇願して地獄を巡り，今は大日如来となっている亡父義朝に会うというものである。…

※「御曹子島渡り伝説」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報