Image prompt collection · クリエイター向け独立ガイド
Nano Bananaの漫画・キャラクター用プロンプト集
参照画像を使ってコマや表紙を作り、編集可能なセリフ用スペースを確保します。
独立した教育コンテンツです。GPT-6とAstraはOpenAI、ClaudeはAnthropic、GeminiとNano BananaはGoogleの製品です。各社の公式な支持を意味しません。 2026年10月15日更新

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要点
参照画像を使ってコマや表紙を作り、編集可能なセリフ用スペースを確保します。
An effective image prompt gives the tool constraints that a comic artist would recognize: stable character identity, camera, negative space for text and a clear panel function. Start with original characters rather than existing franchise lookalikes.
資料から確認できること Google image docs explain model support and reference constraints. Recipes are illustrative prompt-writing advice, not a reported test. Verify the source ↗
Worked example · editable production brief
Nano Banana comic prompt recipe
Build each comic prompt from controllable parts instead of stuffing the entire comic script into one image description.
| Prompt ingredient | Example value | Why it matters |
|---|---|---|
| Identity | C01: copper robot, teal eyes, yellow apron | Stable cast across scenes |
| Framing | Medium shot, waist-up, left third of panel | Leave space for dialogue |
| Action | Tips watering can toward old boot | One clear narrative beat |
| Style & palette | Clean bold inks, muted teal/gold cel shading | Visual continuity |
| Constraints | No lettering, no logos, keep reference appearance | Reduce fix-up and IP confusion |
Use the same reference sheet whenever supported; add balloon text in an editor after the visual pass.
手順ガイド
Follow the sequence using an original or authorized project. The workshop above is an editorial plan, not output falsely attributed to a model.
Step 1
Fix your image aspect ratio
Use a layout appropriate for portrait panels, a square strip or a tall webtoon rather than improvising the crop after generation.
Step 2
Supply original reference artwork
Provide the same character sheet in every relevant generation where the tool supports it.
Step 3
Describe the shot and emotional beat
Specify wide, medium or close-up, direction of gaze, scene action and contrast. Keep the story beat singular.
Step 4
Reserve lettering zones
Prefer clean negative space for dialogue balloons; add exact text in the layout editor.
Step 5
Evaluate the sequence, not one image
Lay out panels at the final intended reading size and inspect face consistency and visual pacing.
コピーして使えるプロンプト
Replace placeholder details with your own original story and reference assets. Paste into a compatible model or workflow; available tools and results differ.
1. Four-panel slice-of-life strip
Create four distinct visual beats of an original comic with two recurring characters: a teal-haired bike mechanic in an orange jacket and a fluffy grey dog with a red bandana. Panel beats: flat tire, surprise pawprint, improvised repair, playful reunion. Keep cast, clothes, bicycle and dog markings consistent. No words or logos in the artwork.
2. Manga cover composition
Original sci-fi manga cover, portrait composition, confident mechanic hero centered slightly left, futuristic station background, controlled red/teal palette, dramatic rim lighting, large clear area at top for manually added title. No generated lettering, trademarks or recognizable existing characters.
3. Webtoon vertical panel
A single tall webtoon panel of an original detective in a rainy neon alley. Low camera angle; significant vertical breathing room for scroll pacing; blue rain reflections, cinematic shadows, reserved blank space for dialogue. Maintain the same coat, haircut and badge from the attached reference.
Failure → Cause → Fix
漫画制作で起こる問題と解決策
Specific failure patterns matter more than a generic 'try again'. These fixes target the output you can inspect.
1. Text spelling is inconsistent
考えられる原因 Generated pixels are hard to retype.
対処方法 Request blank balloon space; letter manually.
2. Three different art styles appear
考えられる原因 Style varies from panel to panel.
対処方法 Carry a fixed palette and ink/lighting description.
3. Image crops off heads and balloons
考えられる原因 Aspect ratio and composition were underspecified.
対処方法 Lock output shape and blank-space requirements.
公開前に確認すること
Review progress: 0 of 4 checks complete
A personal QA worksheet, not an automated pass/fail evaluation of your image.
よくある質問
Is Nano Banana the same as Gemini?
Nano Banana names Google's Gemini image-generation models; exact model versions and supported features can differ.
What is the best prompt for several comic panels?
A consistent character sheet and separate prompts for each beat are often easier to edit than a single sprawling page prompt.
Can I put lettering inside the prompt?
You can request text, but inspect accuracy closely; manual lettering is usually easier to correct and translate.
参考資料
Primary documentation and public creator discussions; not a substitute for hands-on results.