* Kappa statistic (in statistics): You find the kappa statistic in statistical analyses, particularly those assessing inter-rater reliability. It's a calculated value, not a location. You won't "find" it in a specific place, but rather you compute it using statistical software or by hand from data comparing the ratings of two or more raters.
* Kappa (in mythology/folklore): This refers to a mischievous water goblin in Japanese folklore. You'll "find" kappa in Japanese folklore stories, books, and sometimes depicted in art or media related to Japanese mythology. It's a fictional creature, not a physical location.