Vocabulary What does 積み重ね (つみかさね) mean? 積み重ね (つみかさね) means accumulation, buildup (over time). Quick factsReadingつみかさねPart of speechnounLevel (estimated, JLPT framework)N2 積み重ねつみかさねN2 · estimated, JLPT frameworkCommonaccumulation, buildup (over time)1noun pile; accumulationKanji in this word積accumulation; area, volume重heavy; important