【保存版】Midjourneyプロンプト呪文集100選|画風別・シーン別まとめ
Midjourneyで理想の画像を生成するには、プロンプト(呪文)の書き方がすべてを決める。同じ「猫」を描かせるにしても、プロンプト次第でフォトリアルな写真にもジブリ風イラストにもなる。
この記事では、実際に高品質な画像が生成できるプロンプトを画風別・シーン別に100個厳選した。コピペしてそのまま使える実用的な呪文集として活用してほしい。
Midjourneyプロンプトの基本構文
Midjourneyのプロンプトは、以下の構造で書く。
/imagine prompt: [被写体の説明], [画風・スタイル], [雰囲気・ライティング], [パラメータ]
例:
/imagine prompt: a cozy Japanese cafe interior with wooden furniture and warm lighting, watercolor painting style, soft afternoon sunlight, --ar 16:9 --stylize 800
基本ルール
- 英語で書く: 日本語よりも英語のほうが精度が高い
- 前に書いたものほど重要度が高い: 最も重要な要素を先頭に置く
- カンマで区切る: 要素ごとにカンマで区切ると、AIが各要素を個別に認識する
- 具体的に書く: 「beautiful」より「golden hour sunlight filtering through cherry blossom trees」のほうが良い結果が出る
画風別プロンプト(40選)
写実的・フォトリアル(8選)
写真のようなリアルな画像を生成するためのプロンプト。
1. 商品撮影風(プロダクトフォト)
/imagine prompt: minimalist product photography of a ceramic coffee mug, white background, soft studio lighting, high-end commercial photography, sharp focus, 8K resolution --ar 1:1 --stylize 200
2. ポートレート風
/imagine prompt: professional headshot portrait, natural window light, shallow depth of field, bokeh background, Canon EOS R5 85mm f/1.4, warm color grading --ar 3:4 --stylize 300
3. 料理写真(フードフォト)
/imagine prompt: overhead shot of Japanese ramen in a ceramic bowl, steam rising, chopsticks, dark moody food photography, dramatic side lighting, shallow depth of field --ar 4:5 --stylize 400
4. 建築写真
/imagine prompt: modern Japanese minimalist house exterior, concrete and wood materials, clean lines, architectural photography, golden hour light, wide angle lens --ar 16:9 --stylize 300
5. 風景写真
/imagine prompt: Mount Fuji at sunrise with reflection on Lake Kawaguchi, long exposure photography, vibrant colors, mist over the water, ultra-wide angle lens --ar 21:9 --stylize 500
6. ストリートフォト
/imagine prompt: rainy Tokyo street at night, neon reflections on wet pavement, Shibuya crossing, cinematic street photography, Leica Q2 35mm, moody atmosphere --ar 3:2 --stylize 600
7. マクロ撮影
/imagine prompt: extreme macro photography of morning dew drops on a spider web, iridescent light refraction, dark background, incredible detail, Canon MP-E 65mm --ar 1:1 --stylize 400
8. ファッション撮影
/imagine prompt: high fashion editorial photography, model wearing avant-garde geometric dress, minimalist white studio, dramatic harsh lighting, Vogue magazine style --ar 2:3 --stylize 500
アニメ・イラスト風(8選)
9. ジブリ風
/imagine prompt: Studio Ghibli inspired landscape, lush green countryside with a small wooden cottage, puffy white clouds, vibrant colors, hand-painted animation style, nostalgic atmosphere --ar 16:9 --stylize 800
10. 新海誠風
/imagine prompt: Makoto Shinkai style cityscape, dramatic sky with layered clouds, golden hour, lens flare, photorealistic anime, high detail urban environment, emotional lighting --ar 16:9 --stylize 750
11. 90年代アニメ風
/imagine prompt: 1990s retro anime style character illustration, cel shading, VHS aesthetic, slightly grainy texture, Cowboy Bebop and Neon Genesis Evangelion inspired, warm color palette --ar 3:4 --stylize 600
12. 少女漫画風
/imagine prompt: shoujo manga style illustration, delicate line art, sparkle effects, flower decorations, soft pastel colors, romantic atmosphere, screen tone texture --ar 3:4 --stylize 500
13. サイバーパンクアニメ風
/imagine prompt: cyberpunk anime illustration, neon-lit futuristic Tokyo, holographic advertisements, rain-soaked streets, Akira and Ghost in the Shell inspired, detailed mechanical design --ar 16:9 --stylize 700
14. かわいいデフォルメ風(チビキャラ)
/imagine prompt: chibi kawaii character design, big sparkly eyes, pastel color palette, simple background with stars and hearts, cute proportions 2:3 head to body ratio, flat color illustration --ar 1:1 --stylize 400
15. ダークファンタジーイラスト
/imagine prompt: dark fantasy illustration, ancient dragon perched on a ruined castle, moonlit scene, dramatic volumetric lighting, detailed scales and textures, epic fantasy book cover art --ar 2:3 --stylize 800
16. フラットデザインイラスト
/imagine prompt: modern flat design illustration, people working in a coworking space, geometric shapes, limited color palette of 5 colors, clean vector style, no gradients, editorial illustration --ar 16:9 --stylize 300
水彩画・油絵・伝統アート(8選)
17. 透明水彩風
/imagine prompt: transparent watercolor painting of cherry blossom branch, wet-on-wet technique, soft color bleeding, white paper showing through, delicate brushstrokes, botanical illustration style --ar 3:4 --stylize 700
18. 油絵風(印象派)
/imagine prompt: impressionist oil painting of a French lavender field at sunset, visible thick brushstrokes, vibrant purple and orange palette, Claude Monet inspired, textured canvas feel --ar 16:9 --stylize 800
19. 浮世絵風
/imagine prompt: traditional ukiyo-e woodblock print style, great wave with Mount Fuji in background, bold outlines, flat color areas, Hokusai inspired, traditional Japanese color palette, washi paper texture --ar 3:2 --stylize 750
20. 墨絵(水墨画)風
/imagine prompt: Japanese sumi-e ink wash painting, bamboo grove in mist, minimalist composition, varying ink density from deep black to pale gray, rice paper texture, zen aesthetic --ar 2:3 --stylize 600
21. ゴッホ風
/imagine prompt: Vincent van Gogh style painting, starry night over a Japanese temple, swirling sky, thick impasto brushstrokes, vivid blues and yellows, post-impressionist, emotional intensity --ar 16:9 --stylize 900
22. アールヌーヴォー風
/imagine prompt: Art Nouveau style illustration, elegant woman surrounded by flowing organic floral patterns, Alphonse Mucha inspired, ornamental border design, gold and earth tone palette --ar 2:3 --stylize 800
23. 点描画風
/imagine prompt: pointillism painting style, Sunday afternoon park scene, thousands of small dots creating the image, Georges Seurat inspired, vibrant colors, impressionist light --ar 16:9 --stylize 700
24. パステル画風
/imagine prompt: soft pastel drawing of a sleeping cat on a windowsill, gentle smudged edges, chalky texture, warm afternoon light, cozy domestic scene, Mary Cassatt inspired --ar 4:3 --stylize 500
3D・CG・デジタルアート(8選)
25. アイソメトリック3D
/imagine prompt: isometric 3D illustration of a modern office space, cute miniature style, soft shadows, pastel color palette, clean geometric shapes, low poly aesthetic --ar 1:1 --stylize 400
26. クレイモーフィズム(粘土風3D)
/imagine prompt: claymorphism 3D render, cute robot character made of clay, soft rounded shapes, warm studio lighting, pastel background, Pixar style, playful and friendly --ar 1:1 --stylize 500
27. ネオンサイバー3D
/imagine prompt: futuristic 3D render, floating geometric shapes in dark void, neon pink and cyan lighting, reflective chrome surfaces, volumetric fog, Octane render quality --ar 16:9 --stylize 600
28. ローポリ3D
/imagine prompt: low poly 3D landscape, geometric mountains and trees, faceted surfaces, gradient sky from orange to purple, stylized nature scene, Cinema 4D render --ar 16:9 --stylize 400
29. フォトリアル3D(Unreal Engine風)
/imagine prompt: photorealistic 3D interior render, Scandinavian living room, natural materials, large windows with forest view, ray-traced global illumination, Unreal Engine 5 quality --ar 16:9 --stylize 300
30. Pixar風3Dキャラクター
/imagine prompt: Pixar style 3D character design, friendly elderly Japanese chef, expressive face with warm smile, detailed fabric textures, subsurface scattering on skin, studio lighting --ar 3:4 --stylize 600
31. ボクセルアート
/imagine prompt: voxel art scene, Japanese convenience store at night, glowing warm interior light, pixel-perfect cubic construction, Minecraft meets Studio Ghibli, isometric view --ar 16:9 --stylize 500
32. サイケデリック・デジタルアート
/imagine prompt: psychedelic digital art, fractal patterns morphing into natural forms, kaleidoscope symmetry, vivid neon rainbow colors, trippy optical illusion, high detail, 8K --ar 1:1 --stylize 1000
その他のスタイル(8選)
33. ピクセルアート
/imagine prompt: 16-bit pixel art, Japanese shrine surrounded by autumn maple trees, limited color palette, retro video game aesthetic, crisp pixel edges, SNES era style --ar 16:9 --stylize 400
34. コミック・アメコミ風
/imagine prompt: American comic book style, dynamic action pose, bold black outlines, halftone dot shading, speech bubble space, Jack Kirby inspired dynamic composition, vibrant primary colors --ar 2:3 --stylize 600
35. ステンドグラス風
/imagine prompt: stained glass window design, Japanese crane and cherry blossoms, bold black leading lines, translucent jewel-tone colors, backlighting effect, Gothic cathedral style --ar 2:3 --stylize 700
36. ペーパーカット風
/imagine prompt: paper cut art illustration, layered paper depth effect, Japanese landscape with temple and mountains, subtle shadows between layers, delicate cutout details, white paper on colored background --ar 16:9 --stylize 500
37. リトグラフ風
/imagine prompt: vintage lithograph print, botanical illustration of Japanese morning glory, scientific accuracy, aged paper texture, muted natural colors, 19th century naturalist style --ar 3:4 --stylize 600
38. グラフィティ・ストリートアート風
/imagine prompt: street art mural on brick wall, bold graffiti lettering with Japanese characters, spray paint texture, dripping paint effects, Banksy meets KAWS style, urban environment --ar 16:9 --stylize 700
39. 切り絵風
/imagine prompt: Japanese kiri-e paper cutting art, silhouette scene of festival with lanterns, intricate cut details, single sheet design, traditional Japanese motifs, backlit effect --ar 3:2 --stylize 600
40. コラージュ風
/imagine prompt: mixed media collage art, vintage Japanese magazine clippings, torn paper edges, overlapping textures, washi tape elements, retro typography, analog aesthetic --ar 1:1 --stylize 500
シーン別プロンプト(40選)
風景(8選)
41. 桜並木の春景色
/imagine prompt: breathtaking avenue of cherry blossom trees in full bloom, petals falling like snow, traditional Japanese stone path, soft morning mist, golden hour warm light --ar 16:9 --stylize 600
42. 夏の海辺
/imagine prompt: crystal clear turquoise ocean beach, white sand, dramatic cumulus clouds, tropical sunset, aerial drone perspective, travel photography style --ar 16:9 --stylize 500
43. 秋の紅葉と渓谷
/imagine prompt: Japanese mountain valley in autumn, vibrant red and gold maple leaves, crystal clear stream with smooth rocks, misty atmosphere, landscape photography --ar 16:9 --stylize 600
44. 冬の雪景色
/imagine prompt: snow-covered traditional Japanese village, thatched roof houses, warm glowing windows, gentle snowfall, twilight blue hour, Shirakawa-go inspired, serene winter landscape --ar 16:9 --stylize 700
45. 都市のスカイライン
/imagine prompt: Tokyo skyline at blue hour, Tokyo Tower and Skytree visible, reflections on Sumida River, city lights beginning to glow, long exposure effect, cinematic composition --ar 21:9 --stylize 500
46. 森の中の小道
/imagine prompt: enchanted forest path with moss-covered trees, dappled sunlight filtering through canopy, mysterious atmosphere, Yakushima cedar forest inspired, ethereal green light --ar 9:16 --stylize 700
47. 砂漠の夕暮れ
/imagine prompt: vast desert sand dunes at sunset, dramatic long shadows, wind-blown sand particles catching golden light, minimalist composition, solitary figure in distance for scale --ar 21:9 --stylize 600
48. 天の川の星空
/imagine prompt: Milky Way galaxy arching over Japanese countryside, rice paddies reflecting starlight, no light pollution, long exposure astrophotography, incredible detail in nebula --ar 16:9 --stylize 800
建築・インテリア(8選)
49. モダン和室
/imagine prompt: modern Japanese minimalist interior, tatami room with tokonoma alcove, shoji sliding doors, ikebana flower arrangement, natural wood and white plaster, warm indirect lighting --ar 16:9 --stylize 400
50. 未来的オフィス
/imagine prompt: futuristic open office space, biophilic design with vertical gardens, floating holographic displays, natural light through curved glass ceiling, 2030 workplace concept --ar 16:9 --stylize 500
51. カフェインテリア
/imagine prompt: cozy third wave coffee shop interior, exposed brick walls, industrial pendant lights, wooden counter with espresso machine, plants hanging from ceiling, warm atmosphere --ar 16:9 --stylize 500
52. 図書館
/imagine prompt: grand library interior with floor-to-ceiling bookshelves, rolling ladder, warm reading lamps, leather armchairs, shaft of golden sunlight through tall windows, academia aesthetic --ar 16:9 --stylize 700
53. 温泉旅館
/imagine prompt: traditional Japanese ryokan, outdoor onsen hot spring bath, bamboo fence, steam rising into cold air, snow on rocks, garden lanterns, twilight atmosphere --ar 16:9 --stylize 600
54. ガラス建築
/imagine prompt: contemporary glass and steel architecture, museum building, dramatic cantilever, reflections of clouds on glass facade, Tadao Ando meets Zaha Hadid, architectural photography --ar 3:2 --stylize 400
55. 廃墟美
/imagine prompt: beautiful abandoned building reclaimed by nature, vines growing through broken windows, sunlight streaming through collapsed roof, moss-covered floor, hauntingly beautiful atmosphere --ar 3:2 --stylize 700
56. ブティックホテル
/imagine prompt: luxury boutique hotel room, japandi style interior, platform bed with linen bedding, floor-to-ceiling ocean view window, neutral earth tones, editorial interior photography --ar 16:9 --stylize 400
食べ物・料理(8選)
57. 和食の盛り付け
/imagine prompt: exquisite Japanese kaiseki course, delicate ceramic plate, seasonal autumn ingredients, artistic plating, maple leaf garnish, overhead flat lay, dark slate background --ar 1:1 --stylize 400
58. パン屋のディスプレイ
/imagine prompt: artisan bakery display, freshly baked sourdough loaves, golden croissants, rustic wooden shelves, flour dusting, warm morning light through window, editorial food photography --ar 4:3 --stylize 500
59. カクテル
/imagine prompt: craft cocktail with smoke effect, crystal clear ice sphere, garnished with dehydrated citrus, dark moody bar setting, dramatic rim lighting, mixology art photography --ar 3:4 --stylize 600
60. お弁当
/imagine prompt: beautiful Japanese bento box, compartmentalized wooden container, colorful rice balls with nori art, tamagoyaki, seasonal vegetables, overhead view, natural daylight --ar 1:1 --stylize 400
61. ラテアート
/imagine prompt: intricate latte art in ceramic cup, detailed rosetta pattern, coffee shop table with pastry, shallow depth of field, morning sunlight, Instagram-worthy composition --ar 1:1 --stylize 300
62. スイーツプレート
/imagine prompt: elegant French patisserie dessert plate, chocolate sphere with gold leaf, raspberry coulis art on white plate, fine dining presentation, dramatic spotlight --ar 4:3 --stylize 500
63. 屋台フード
/imagine prompt: Japanese festival street food stall, takoyaki being made on griddle, steam and smoke, warm lantern light, nighttime atmosphere, close-up documentary style --ar 3:2 --stylize 500
64. モーニングテーブル
/imagine prompt: Scandinavian breakfast spread flat lay, sourdough toast avocado eggs, fresh berries, coffee, linen napkin, marble table, soft diffused morning light, lifestyle photography --ar 1:1 --stylize 400
ファンタジー・SF(8選)
65. 浮遊城
/imagine prompt: floating castle above the clouds, waterfalls cascading into void, lush vegetation growing on stone walls, magical golden light, epic fantasy concept art, matte painting quality --ar 16:9 --stylize 800
66. 宇宙ステーション
/imagine prompt: interior of space station observation deck, Earth visible through panoramic window, holographic displays, zero gravity floating objects, hard science fiction, cinematic lighting --ar 21:9 --stylize 600
67. 魔法の森
/imagine prompt: enchanted forest with bioluminescent plants, glowing mushrooms, fairy lights, mystical fog, ancient massive tree in center, fantasy concept art, ethereal atmosphere --ar 16:9 --stylize 800
68. スチームパンク都市
/imagine prompt: steampunk city panorama, brass and copper buildings with gears, airships docking at sky ports, Victorian architecture meets industrial revolution, warm sepia tones --ar 21:9 --stylize 700
69. 海底都市
/imagine prompt: underwater city with glass dome habitats, bioluminescent marine life, coral architecture, deep ocean blue and teal palette, schools of fish, science fiction concept art --ar 16:9 --stylize 700
70. ドラゴンの巣
/imagine prompt: dragon's lair inside volcano, massive dragon sleeping on gold hoard, molten lava rivers, crystalline formations, dramatic chiaroscuro lighting, epic fantasy illustration --ar 16:9 --stylize 800
71. ポストアポカリプス
/imagine prompt: post-apocalyptic Tokyo, overgrown skyscrapers with vegetation, deer walking on empty highway, beautiful decay, nature reclaiming civilization, cinematic composition --ar 21:9 --stylize 600
72. 異世界の市場
/imagine prompt: fantasy bazaar marketplace, floating lanterns, exotic alien fruits and magical artifacts on display, diverse fantasy races, bustling atmosphere, warm spice-toned palette --ar 16:9 --stylize 700
ビジネス・テクノロジー(8選)
73. AIとの協働シーン
/imagine prompt: abstract visualization of human and AI collaboration, neural network patterns connecting to human silhouette, blue and purple gradient, clean modern design, technology concept art --ar 16:9 --stylize 500
74. データビジュアライゼーション
/imagine prompt: 3D holographic data visualization floating in dark space, flowing data streams, glowing nodes and connections, blue and cyan color scheme, futuristic analytics dashboard concept --ar 16:9 --stylize 500
75. リモートワーク
/imagine prompt: aesthetic home office setup, ultrawide monitor, mechanical keyboard, indoor plants, clean desk organization, natural window light, warm and productive atmosphere, lifestyle photography --ar 16:9 --stylize 400
76. ブロックチェーンの概念図
/imagine prompt: abstract blockchain concept visualization, interconnected glowing blocks forming chain, decentralized network nodes, dark background with cyan and gold accents, technology illustration --ar 16:9 --stylize 500
77. プレゼンテーション背景
/imagine prompt: clean abstract background for business presentation, subtle geometric gradient, professional blue and white color scheme, minimal design, no text, corporate aesthetic --ar 16:9 --stylize 200
78. サステナビリティ
/imagine prompt: sustainable future city concept, solar panels on every roof, vertical farms, electric vehicles, abundant green spaces, clean energy, optimistic utopian vision, aerial view --ar 16:9 --stylize 500
79. スタートアップオフィス
/imagine prompt: vibrant startup office space, standing desks, whiteboard covered in sticky notes, diverse team collaborating, exposed ductwork ceiling, energetic atmosphere, editorial photography --ar 16:9 --stylize 400
80. サイバーセキュリティ
/imagine prompt: cybersecurity concept art, digital shield protecting data, binary code rain, matrix-like environment, lock and key hologram, dark background with electric blue accents --ar 16:9 --stylize 500
特殊効果・テクスチャ指定プロンプト(20選)
ライティング効果(5選)
81. ゴールデンアワー
/imagine prompt: [被写体], golden hour sunlight, warm orange and amber tones, long dramatic shadows, lens flare, magic hour atmosphere --ar 16:9
82. ネオンライト
/imagine prompt: [被写体], neon light illumination, vibrant pink and blue glow, reflections on wet surfaces, cyberpunk atmosphere, night scene --ar 16:9
83. レンブラント光線
/imagine prompt: [被写体], Rembrandt lighting, dramatic chiaroscuro, single light source creating triangle of light on cheek, rich shadows, classical portrait lighting --ar 3:4
84. シルエット
/imagine prompt: [被写体], dramatic silhouette against sunset sky, vibrant orange and purple gradient, backlighting, minimal detail on subject, strong contrast --ar 16:9
85. 霧と光芒
/imagine prompt: [被写体], volumetric god rays through fog, mystical atmosphere, crepuscular rays, mist diffusing light, ethereal and dreamlike --ar 16:9
カメラ効果(5選)
86. ティルトシフト(ミニチュア風)
/imagine prompt: [被写体], tilt-shift miniature effect, selective focus, oversaturated colors, city looks like toy model, aerial perspective --ar 16:9
87. ダブルエクスポージャー
/imagine prompt: [被写体A] double exposure with [被写体B], blended silhouettes, overlapping imagery, artistic photo manipulation, ethereal quality --ar 3:4
88. 魚眼レンズ
/imagine prompt: [被写体], extreme fisheye lens distortion, 180 degree field of view, barrel distortion, dynamic perspective, action sports photography --ar 1:1
89. 長時間露光
/imagine prompt: [被写体], long exposure photography, light trails, smooth water surface, star trails in sky, motion blur on moving elements --ar 16:9
90. 赤外線フォト
/imagine prompt: [被写体], infrared photography, white foliage, dark sky, surreal color inversion, dreamlike landscape, IR filter effect --ar 16:9
テクスチャ・質感(5選)
91. 大理石テクスチャ
/imagine prompt: [被写体], marble texture surface, white Carrara marble with grey veins, polished reflective surface, luxury aesthetic, seamless pattern --ar 1:1
92. 木目テクスチャ
/imagine prompt: [被写体], natural wood grain texture, warm walnut wood, visible annual rings, handcrafted feel, wabi-sabi aesthetic --ar 16:9
93. 金属質感
/imagine prompt: [被写体], brushed stainless steel surface, metallic reflections, industrial precision, cold bluish tone, manufacturing quality --ar 1:1
94. 布地テクスチャ
/imagine prompt: [被写体], rich velvet fabric texture, deep jewel tone color, light catching on fabric nap, luxurious tactile quality, close-up macro --ar 1:1
95. ガラス・透明感
/imagine prompt: [被写体], glass refraction effect, transparent material, caustic light patterns, rainbow prismatic dispersion, clean and pristine --ar 1:1
カラーパレット指定(5選)
96. モノクローム
/imagine prompt: [被写体], black and white photography, high contrast, deep blacks and bright whites, Ansel Adams inspired, dramatic tonal range --ar 16:9
97. パステルカラー
/imagine prompt: [被写体], soft pastel color palette, baby pink mint green lavender, gentle and dreamy, low saturation, airy atmosphere --ar 16:9
98. アースカラー
/imagine prompt: [被写体], earth tone color palette, terracotta olive sage brown cream, natural and organic feel, warm and grounded --ar 16:9
99. ヴィンテージカラー
/imagine prompt: [被写体], vintage film color grading, faded warm tones, slight grain, Kodak Portra 400 look, nostalgic 1970s atmosphere --ar 16:9
100. ネオンポップ
/imagine prompt: [被写体], neon pop art colors, electric pink cyan yellow, high saturation, bold and energetic, Andy Warhol meets Takashi Murakami --ar 1:1
品質向上パラメータ完全ガイド
基本パラメータ
| パラメータ | 説明 | 値の範囲 | 推奨値 |
|---|---|---|---|
--ar | アスペクト比 | 任意の比率 | 用途に応じて |
--stylize (--s) | AIの芸術的解釈の強さ | 0〜1000 | 200〜800 |
--chaos (--c) | 結果のバリエーション | 0〜100 | 0〜30 |
--quality (--q) | 生成品質 | .25, .5, 1 | 1 |
--stop | 生成を途中で止める | 10〜100 | 用途に応じて |
--tile | シームレスパターン | - | タイル素材時 |
--no | ネガティブプロンプト | テキスト | 不要要素の除外 |
--stylize の使い分け
- 0〜100: プロンプトに忠実。デザイン素材やロゴ制作向き
- 100〜400: バランス型。ビジネス用途の多くに適する
- 400〜700: 芸術的要素が強まる。SNS投稿やポートフォリオ向き
- 700〜1000: AIの解釈が最大限に反映される。アート作品向き
--chaos の使い分け
- 0: 安定した出力。確定したスタイルで量産するとき
- 10〜30: 適度なバリエーション。複数候補から選びたいとき
- 30〜100: 予想外の結果が出やすい。インスピレーションを得たいとき
アスペクト比の用途別推奨値
| 用途 | 推奨アスペクト比 |
|---|---|
| Instagramフィード | --ar 1:1 または --ar 4:5 |
| Instagramストーリー | --ar 9:16 |
| YouTubeサムネイル | --ar 16:9 |
| Xヘッダー | --ar 3:1 |
| ブログアイキャッチ | --ar 16:9 または --ar 3:2 |
| スマホ壁紙 | --ar 9:16 |
| PC壁紙 | --ar 21:9 |
| ポスター | --ar 2:3 |
ネガティブプロンプトの活用法
--no パラメータで、画像に含めたくない要素を指定する。
よく使うネガティブプロンプト
--no text, watermark, logo, signature, blurry, low quality, distorted
シーン別ネガティブプロンプト
人物系:
--no extra fingers, extra limbs, deformed hands, cross-eyed, asymmetric face
風景系:
--no people, cars, modern buildings, power lines, artificial objects
プロダクト系:
--no background clutter, shadows, reflections, text overlay
クリーンデザイン系:
--no noise, grain, artifacts, busy background, cluttered composition
商用利用時の注意点
Midjourneyの商用利用ルール(2026年時点)
- 有料プランユーザー: 生成画像の商用利用可能
- 無料トライアル: 商用利用不可
- 年間売上1M USD超の企業: Pro Plan以上が必要
- 生成画像の著作権: ユーザーに帰属(ただし法的なグレーゾーンあり)
商用利用時のベストプラクティス
- 実在の人物に似た画像は使わない: 肖像権の問題がある
- 既存ブランドのロゴ・キャラクターを含めない: 商標権侵害の可能性
- 「〇〇 style」で特定のアーティスト名を使う場合は注意: 法的リスクがある
- 重要な商用利用では弁護士に相談: AI生成画像の法的位置づけは各国で流動的
まとめ
Midjourneyのプロンプトは「呪文」と呼ばれるだけあり、正しい言葉の組み合わせが魔法のような結果を生む。この記事の100個のプロンプトをベースに、自分の用途に合わせてカスタマイズしていこう。
重要なのは以下の3点だ。
- 被写体 + スタイル + 雰囲気 + パラメータの構造を守る
- 具体的な言葉を使う(「きれい」ではなく「golden hour warm light」)
- パラメータを使いこなす(特に
--arと--stylize)
画像生成AIのプロンプトをもっと極めたいなら、KnowCreaをチェックしてほしい。 プロのクリエイターが実際の商用案件で使っているプロンプトテンプレートが手に入る。自分のプロンプトノウハウを販売して収益化することもできる。