How to say "loyal" in Japanese

• 忠実ちゅうじつJLPT N1approx.Common
  na-adjective, nounThe default word for 'loyal': faithful and devoted to a person, group, or duty. It also covers 'faithful' and 'honest', so it fits most ordinary contexts where loyalty is meant.
  あの翻訳ほんやくは原文げんぶんに忠実ちゅうじつだそうだ。↗

  That translation is said to be true to the original.
• 忠なるちゅうなる
  pre-noun adjectivalA less common, formal or literary way to say devoted, loyal, true, or faithful. Rarely the word learners need for 'loyal'; choose it chiefly when writing in an elevated or literary style.

Use 忠実 for everyday expressions of loyalty or faithfulness to people, groups, or duties; use 「忠なる」 only when a formal or literary flavor is wanted.

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

• 忠実ちゅうじつfaithful
• 忠なるちゅうなるdevoted