第だい一いっ種しゅ

noun, used as a prefix

type 1; category 1; first class

Used as a prefix to classify something as the first type or category, often in technical, regulatory, or formal contexts.

• 第だい一いっ種しゅ電でん気き工こう事じ士しの資し格かくを取とった。

  I obtained a Type 1 electrician license.

• この薬やく品ひんは第だい一いっ種しゅ指し定てい化か学がく物ぶっ質しつに該がい当とうする。

  This chemical falls under Class 1 designated chemical substances.