also: ずうち
noun
reaching a peak; plateauing; hitting a ceiling
Describes a situation where growth, improvement, or increase has stopped and seems unlikely to continue. Often used in economic, business, or statistical contexts.
売り上げの伸びが頭打ちになっている。
Sales growth has plateaued.
この技術はもう頭打ちだ。
This technology has already reached its limit.