1. What Did the Oldest Records Say About the Turtle?
The story is much older than the picture book. A Japanese encyclopedia lists several early versions of the legend of a fisherman called Urashima no Ko ("the child of Urashima"). They include an entry in the Nihon Shoki (Chronicles of Japan) for the 22nd year of Emperor Yūryaku, and a passage from the Tango Fudoki, a regional record of the old province of Tango, which is now in northern Kyoto Prefecture [2]. English Wikipedia adds that legends of Urashima were written down as early as the 8th century [1].
The Tango Fudoki has not survived as a book. We know it only through copies and quotations in later works [3]. A travel magazine's summary of those quotations says that the fisherman Urashimako hooks a turtle and is led off to Tokoyo, an otherworld across the sea. There he marries a lady, spends three years that feel like a dream, then goes home with a precious box he was told never to open. At home, 300 years have gone by. He opens the box and turns old [3].
Nobody in that summary rescues anything. The turtle is caught on a hook, and then it leads the way to another world. A Japanese-language dictionary explains why: it suggests that the first form of the story was a marriage between an ordinary fisherman and a god who had taken the shape of a turtle [2]. If that is right, the turtle may have started out as the doorway to a magical world, not as a creature in need of help. So when did the helping begin?
2. When Did the Fisherman Start Setting the Turtle Free?
The change comes with the otogizōshi, a large group of short story books written between the Muromachi period and the early Edo period (1600s). A guide from Japan's National Diet Library says that around 400 such tales may have been created in that time, and that Urashima Tarō was one of them [4]. At first, the tales were not written for children. They were enjoyed by more and more kinds of readers [4].
A dictionary of the Japanese language says that the otogizōshi version, whose author is unknown and which is thought to date from the end of the Muromachi period, added a story of a turtle repaying a kindness. It is also the version that first calls the hero "Tarō," a common name for a first son [2]. One encyclopedia summarizes the plot this way. Urashima catches a turtle and lets it go. The next day a woman arrives in a small boat. She turns out to be the turtle, and she takes him to the Dragon Palace (Ryūgū), where they marry. After three years he goes home, finds that 700 years have passed, and opens the box, and a wisp of cloud rises and he grows old [2]. In that telling he later appears as a god who is joined with the turtle princess [2]. English Wikipedia notes that some versions instead end with Urashima turning into a crane [1].
The same dictionary describes the longer trend this way: in the Muromachi tales the turtle's thanks for being spared is added, in the Edo period the turtle and the woman become entirely separate characters, and in modern times, as the tale was turned into a children's story, the old idea of marrying a divine being fades and what is left is a visit to a faraway land [2]. Even so, the turtle in the Muromachi tale still turns into a woman. Nobody has climbed on its back yet.
3. Where Did the Boys Teasing the Turtle Come From?
The beach scene is the part of the story that many children remember best, and it is the hardest to find in the old records. It seems to be tied to one writer. Iwaya Sazanami (1870 to 1933) collected tales passed down from the Edo period and earlier, and the publisher Hakubunkan printed them for children in a 24-volume series called Nihon Mukashibanashi (Old Tales of Japan) between 1894 and 1896 [5]. The National Diet Library says the series drew on various otogizōshi and spoken folktales, and that Sazanami avoided the long-winded plots of the old tales in order to create a world of stories aimed at "children" [5].
English Wikipedia says that the Urashima tale most Japanese people know follows Sazanami's storyline, and that a shortened form of it was placed in the national elementary school textbook, which made it familiar to generations of schoolchildren [1]. A travel-magazine article goes one step further. It says the scene of children bullying a turtle on the beach, and the moral that Urashima suffers for breaking a promise when he opens the box, are Meiji-era changes made by Sazanami and spread through the state textbook. It also says the dreamy years in the other world were left out of the children's version for educational reasons [3].
One thing to keep in mind: only this travel article describes the bullying scene so directly, and it is a popular source, not a scholarly study. The sources suggest that Sazanami's 1890s children's books helped shape the version familiar today, and none of the early records we looked at mention bullying.
4. When Did Urashima Start Riding on the Turtle's Back?
You may have noticed that so far the turtle has never carried anyone. English Wikipedia says the picture of Urashima riding a turtle dates only to the early 18th century, and that in older versions he travels by boat to the other world, a place called Hōrai [1]. This date rests on a single encyclopedia, and the exact period for the ride is not something we could confirm from a second source. So we can say cautiously that the ride was added later, during the Edo period (1603 to 1868), after the otogizōshi.
Putting all the layers side by side shows how the turtle's role was stacked up over time. In the early records it is a hooked turtle that leads the fisherman to another world. In the Muromachi tale it is a rescued turtle that returns as a woman. Later pictures give it a back to ride on. In the 1890s children's books it is a turtle rescued from bullies. No one author built the tale in one go. Each age added a piece, and the modern story is the sum.
5. Why Do the Years Away From Home Change From Telling to Telling?
The turtle is not the only thing that moves around. Sources disagree about how long Urashima was away. The quoted Tango Fudoki has him come home after 300 years [3]. An encyclopedia's summary of the otogizōshi version says 700 years [2]. The English Wikipedia introduction to the modern tale says he finds that he has been gone at least 100 years [1]. In every case the time in the other world is only about three years.
These numbers do not need to be settled into one "correct" answer. They show a story that was retold many times by people who changed the details to fit their own time, and the same is true of the turtle.
6. How Can You Compare Turtles in Different Picture Books?
If you can find two or more versions of the story, perhaps in a library or from a different country, make a checklist for each book. Does the turtle appear in these scenes?
- Being hooked or caught by the fisherman
- Being teased by children on the beach
- Being rescued or set free by Urashima
- Carrying Urashima on its back across the sea
Some books will have all four scenes, and some will skip one or more. Two books with different scenes do not mean one is wrong. They may be following different layers of the same old story. Is there a book where the turtle turns into a woman? Is there one where he goes by boat? Each missing scene is a clue about which version the author started from. If you want to dig deeper, the sources below have longer accounts, and the old texts themselves are named in them.