People who live in or have been to Japan: do they actually say "I won't forgive you" in Japan?

Question:

In anime they say to their enemies "I won't forgive you." I just want to know do they actually say this in Japan to their enemies or is it just in anime? Anyone who has been to or lives in Japan.

Answer:

Actually, "harmony" is important in Japanese society. So people want to avoid confrontation as much as they can. They don't show enmity.

That kind of line is rarely used in real Japan.