OGATA was the name of a castle-lord who lived in the Island of the Nine Provinces, (Kiushiu). He had but one son, an infant, whom the people in admiration nicknamed Jiraiya (Young Thunder.) During one of the civil wars, this castle was taken, and Ogata was slain; but by the aid of a faithful retainer, who hid Jiraiya in his bosom, the boy escaped and fled northward to Echigo. There he lived until he grew up to manhood.
At that time Echigo was infested with robbers. One day the faithful retainer of Jiraiya being attacked, made resistance, and was slain by the robbers. Jiraiya now left alone in the world went out from Echigo and led a wandering life in several provinces.
All this time he was consumed with the desire to revive the name of his father, and restore the fortunes of his family. Being exceedingly brave, and an expert swordsman, he became chief of a band of robbers and plundered many wealthy merchants, and in a short time he was rich in men, arms and booty. He was accustomed to disguise himself, and go in person into the houses and presence of men of wealth, and thus learn all about their gates and guards, where they slept, and in what rooms their treasures were stored, so that success was easy.
Hearing of an old man who lived in Shinano, he started to rob him, and for this purpose put on the disguise of a pilgrim. Shinano is a very high table-land, full of mountains, and the snow lies deep in winter. A great snow storm coming on, Jiraiya took refuge in a humble house by the way. Entering, he found a very beautiful woman, who treated him with great kindness. This, however, did not change the robber's nature. At midnight, when all was still, he unsheathed his sword, and going noiselessly to her room, he found the lady absorbed in reading.
Lifting his sword, he was about to strike at her neck, when, in a flash, her body changed into that of a very old man, who seized the heavy steel blade and broke it in pieces as though it were a stick. Then he tossed the bits of steel away, and thus spoke to Jiraiya, who stood amazed but fearless:
"I am a man named Senso Dojin, and I have lived in these mountains many hundred years, though my true body is that of a huge frog. I can easily put you to death but I have another purpose. So I shall pardon you and teach you magic instead."
Then the youth bowed his head to the floor, poured out his thanks to the old man and begged to be received as his pupil.
Remaining with the old man of the mountain for several weeks, Jiraiya learned all the arts of the mountain spirits; how to cause a storm of wind and rain, to make a deluge, and to control the elements at will.
He also learned how to govern the frogs, and at his bidding they assumed gigantic size, so that on their backs he could stand up and cross rivers and carry enormous loads.