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constitutional reform; constitutional amendment
国会は憲法改正を議論した。
The Diet debated the constitutional amendment.
憲法改正の是非が、今、争点だ。
The pros and cons of constitutional amendment are currently a point of contention.
憲法改正に向けた議論は、着実に次の段階に進む。
Debates aimed at constitutional amendment are steadily progressing to the next stage.