The basis or grounds for a claim or judgment; the reason or authority supporting something.
その意見には具体的な根拠が示されていない。
That opinion isn't supported by concrete grounds.
警察は逮捕の根拠を明らかにした。
The police made clear the grounds for the arrest.
根拠のない噂に惑わされてはいけない。
Don't be misled by baseless rumors.
報告書にはデータに基づく根拠が必要だ。
A report needs evidence-based grounds supported by data.
A base of operations; the place serving as a foundation for activities or operations.
彼らは東京を根拠に全国で活動している。
They operate nationwide with Tokyo as their base.
その団体はこの町を根拠に支援活動を続けている。
The organization continues its support activities from this town as its base.