How to say "diagram" in Japanese

• 図ずJLPT N3approx.Common
  noun, noun (suffix)The broadest choice, covering any drawing, picture, figure, or diagram. Use it for a diagram in a textbook or manual, as in a labeled illustration accompanying an explanation.
  図ずで説明せつめいしましょう。↗

  Let me explain it with a diagram.
• グラフJLPT N1approx.Common
  nounCovers graphs and charts rather than diagrams in general. It fits when the English 'diagram' really means a plotted graph or chart of data, and is not the word for a labeled schematic drawing.
  炭素たんそ排出量はいしゅつりょうの変動へんどうが、以下いかのグラフに描えがかれている。↗

  The differing volumes of carbon emissions are plotted in the graph below.
• 図面ずめんCommon
  nounRefers to technical drawings and plans, including blueprints. Use it when 'diagram' means an engineering, architectural, or construction drawing specifying measurements and structure.
  実施じっし設計せっけいとは基本設計きほんせっけいで決きまった計画けいかくを、工事こうじができる図面ずめんに書かく作業さぎょうです。↗

  Detailed design is the work of drawing up a diagram that is capable of being manufactured from the plan set in the baseline design.
• 図式ずしきCommon
  no-adjectiveMatches the sense of diagram as a schema — an abstract, symbolic representation of relationships or a process. It is the natural pick when 'diagram' borders on 'schema' or a systematic scheme.
  これらの図式ずしきは求職きゅうしょくに関かんする様々さまざまなアプローチを示しめしている。↗

  These diagrams demonstrate different possible approaches to job seeking.
• ダイアグラムJLPT N2approx.Common
  nounA direct loanword meaning diagram. It is a safe option when you want the English sense exactly, especially for technical or specialized diagrams such as those discussed in computing or engineering contexts.

Choose 図 for a general drawing or figure, 「グラフ」 for graphs and charts, 図面 for technical drawings and blueprints, 図式 for schematic representations, and 「ダイアグラム」 for loanword-style diagrams.

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

• 図ずdrawing
• グラフgraph
• 図面ずめんdrawing
• 図式ずしきdiagram
• ダイアグラムdiagram
• 図表ずひょうchart
• 図説ずせつillustration
• 線図せんずdiagram
• 図解ずかい(explanatory) diagram
• ダイヤdiagram