One of the great things about yokai is that they turn up in unexpected places... Occasionally, even in the code for video games. Check out this screen from Ninja Gaiden Dragon Sword for the DS, which Hiroko and I translated. Denroku is a bookworm who occasionally pops up to assist the hero with information gleaned from dusty old tomes, one of which was described in the original text as an "encylopedia of yokai." That's how we translated it.
But when we saw the final product, we were surprised so see that our pal Andy (who was the game's localization director -- you may remember him from the interview we all did together a few months back) decided to tweak the translation as an homage to our book Yokai Attack! How cool is that? Now you've got another reason to play through the game (which is a lot of fun, incidentally).