Have to say I thought it'd be something like this, looked too high-tech for a coffin, and years ago I read an ad for modern sleeping capsules that'd help you rest by adjusting temperature and oxygen levels. (also, frickin' ancient joke)
...With the ridiculous technology of the kappas and the quickness of the pets, such a fate was avoided one way or another...Wow, not a scratch on ya.Satori-sama learned of what happened from reading her pets.