[LuxorMG]

So we finally get a (complete) timeline for the series:

Spoiler for age and timeline:

From my first version, it seems the karma demon (I suspect a mistranslation that was supposed to be fiend) appeared 245 years ago, before which the fiend K appeared barely 20 years prior. And before that, there were 80 years with no fiend/karma demon.

-345 (-325): Previously last known case of fiend
-267: Tomiko born
-265 (-245): Fiend K
-245 (-225): Karma demon (cow killing girl)
-170: Tomiko takes up Ethics Committee chairperson

0: Present

However, we know that Tomiko was at least in her 20s when she was a nurse when Fiend K was around. I think I found a mistranslation, so I'm going to assume the values in parentheses are correct.

EDIT: I read a better translation, and Fiend is the right word. So the bolded years should be right.