水平展開 すいへいてんかい Meanings Noun involvement of peer groups (Quality Assurance term) application to similar products grassroots (organization, development, movement) Kanji 水 water. Read as スイ. 平 flat. Read as ヘイ. 展 unfold. Read as テン. 開 open. Read as カイ. Jinuma: Japanese Dictionary · Word lists