平成の大合併 へいせいのだいがっぺい Meanings Expression, Noun the great municipal mergers of the Heisei era (i.e.: series of large-scale municipal mergers carried out between 1995 and 2010 under the temporary Special Mergers Law) See also: 平成 (へいせい). Kanji 平 flat. Read as ヘイ. 成 become. Read as セイ. 大 big. Read as ダイ. 合 fit. Read as ガッ. 併 combine. Read as ヘイ. Jinuma: Japanese Dictionary · Word lists