減点 (genten) means “point deduction” | MotiTan Japanese Dictionary

More examples

この試験では、字数不足も減点の対象になります。ko no shi ken de wa ji sū fu soku mo gen ten no tai shō ni na ri ma su

In this exam, falling short of the required length is also subject to a point deduction.

Describes a score becoming lower because points are taken away for an error or failure to meet a standard.

失点shitten: A loss of points from a score caused by an error, an unsuccessful attempt, or an opponent's success.

誤りや基準に満たない点を理由に、採点された点数から点を引くこと。ayama ri ya ki jun ni mi ta na i ten o ri yū ni sai ten sa re ta ten sū ka ra ten o hi ku ko to

The Sino-Japanese noun 減点 (genten) combines 減 (gen, "decrease") and 点 (ten, "point"), so it denotes a decrease in points.

The expression 減点になる (genten ni naru) describes points being taken off a score, while English commonly uses lose points for the same situation.