カクシン
Meanings
Noun
1. core; heart (of the matter); point; crux; kernel
Pitch accent
クシン
Composed of
stone (of a fruit); pit; core (of an organization, team, etc.); nucleus; nuclear weapons; nucleus (of an atom); nucleus (of a cell)
heart; mind; bottom of one's heart; core (of one's character); centre; center; heart (organ)
Examples (2 in total)
This is the core of the problem.
It is hard to get to the heart of the thing.