紙かみ一ひと重え

noun which may take the genitive case particle 'no', noun

paper-thin difference; razor-thin margin; very slight

Describes an extremely small difference or margin between two things, often used in comparisons or near-miss situations.

• 合ごう格かくと不ふ合ごう格かくの差さは紙かみ一ひと重えだった。