How to say "Instruction" in Japanese

When translating "instruction" into Japanese, you must choose carefully between 説明書 and 指示. In Japanese, 説明書 (せつめいしょ (setsumeisho)) is typically associated with "instruction manual, user's guide" (Syllabus Level: N4) and represents A document providing details on how to use, assemble, or understand something. 製品の使い方や組み立て方などが書かれた文書。. On the other hand, 指示 (しじ (shiji)) maps to "instruction, direction, indication" (Syllabus Level: N2) and represents Orders or directions given by someone in a position of authority, or general guidance on how to do something. 「指示する」. A literal translation of "instruction" can often sound unnatural to native Japanese speakers if mixed up!