“That,” answered the Princess “is the tamate-bako (Box of the Jewel Hand), and it contains something very precious. You must not open this box, whatever happens! If you open it something dreadful will happen to you! Now promise me that you will never open this box!”
And Urashima promised that he would never, never open the box whatever happened.
Then bidding good-by to Otohime Sama he went down to the seashore, the Princess and her attendants following him, and there he found a large tortoise waiting for him