How to say "orthodox" in Japanese

• オーソドックスCommon
  na-adjectiveCovers 'orthodox' in the sense of conventional or standard: the classic, usual way of doing something. A loanword, it is used of methods, styles, or techniques.
• 正統せいとうCommon
  na-adjective, no-adjectiveCovers 'orthodox' in the sense of legitimate or rightful — adherence to an established doctrine, school, or line of succession. It stresses legitimacy and proper inheritance rather than mere convention.
  どちらの王子おうじが正統せいとうな王位おうい継承者けいしょうしゃか。↗

  Which prince is the legitimate heir to the throne?
• 本格的ほんかくてきCommon
  na-adjectiveOnly a marginal match for 'orthodox': it means genuine, real, or authentic — something done in earnest or in full — and is seldom the word you want for orthodoxy in the doctrinal or conventional sense.

Use 「オーソドックス」 for the conventional, standard sense of 'orthodox'; 正統 for the legitimate, doctrinal sense; 本格的 really means genuine or authentic and is only a marginal match for 'orthodox'.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• オーソドックスorthodox
• 正統せいとうlegitimate
• 本格的ほんかくてきgenuine
• 本式ほんしきformal (way)
• 王道的おうどうてきclassic