Where does “自殺点” come from?

自殺点 (Japanese) comes from Japanese 点, from Middle Chinese 點 — mark, spot; dot, mark.

自殺点 (Japanese): own goal

Definitions

Step	Language	Word	Meaning
1	Japanese	点	spot, dot; score, grade, mark; point
2	Middle Chinese	點	mark, spot; dot, mark

自殺点 — Etymology, Origin & Word History | Etymology Explorer