noun which may take the genitive case particle 'no', na-adjective
identical; same; one and the same
Used for things that are exactly the same in identity, content, or value. Often appears in formal or technical contexts.
この二つの書類は同一の内容です。
These two documents have identical content.
犯人
The culprit is believed to be the same person.
noun which may take the genitive case particle 'no', na-adjective
equal; fair; without discrimination
Used for equal treatment or conditions, often in legal, business, or policy contexts. Implies no unfair distinction.
すべての社員に同一の基準を適用する。
Apply the same standards to all employees.
同一労働同一賃金が原則だ。
Equal pay for equal work is the principle.