Belated Cryoburn realization

If you're writing a book about a bunch of Japanese people who are into putting themselves into cryonic suspension for generations at a time - how do you get through it without anyone ever mentioning Urashima Taro? How is that even possible?

(If you don't know who he is, here. The story's like Snow White in Japan - every single person in the country knows it by heart, there are picture-book versions in every grade-school classroom, and it's been retold in kids' and adults' stories of varying levels of metatextuality thousands of times.

...Actually, I'm surprised that Bujold missed it, because one of those retellings was Ursula K. LeGuin's A Fisherman of the Inland Sea, which covers some similar subject matter. Not that, when you re-work a sci-fi concept, you need to read every single re-working that came preceded yours - I just thought that a lot of Anglophone nerds had read this one in particular.)