Once upon a time in the country of Japan there lived two frogs, one of whom made his home in a ditch near the town of Osaka, on the sea coast, while the other dwelt in a clear little stream which ran through the city of Kyoto. At such a great distance apart, they had never even heard of each other; but, funnily enough, the idea came into both their heads at once that they should like to see a little of the world, and the frog who lived at Kyoto wanted to visit Osaka, and the frog who lived at Osaka wished to go to Kyoto.