崩ほう壊かい系けい列れつMeaningsNoun1. decay chain; decay seriesKanji used崩crumble壊break系lineage列rowPitch accentほうかいけいれつComposed of崩ほう壊かいcollapse; crumbling; breaking down; caving in; (radioactive) decay; disintegrationNoun系けい列れつseries; sequence; system; succession; keiretsu (group); conglomeration of businesses linked by cross-shareholdings; affiliated; subsidiaryNoun