โปสเตอร์เทศกาลฤดูร้อนญี่ปุ่นลายพู่กัน

{
  "type": "Japanese summer festival poster",
  "format": "vertical event flyer, print-ready, dramatic high-contrast illustration",
  "overall_style": "luxurious traditional Japanese festival design with navy-black night sky, metallic gold ink splashes, bold sumi-e brush calligraphy, warm red lantern glow, fireworks, ornate wave and hemp-leaf patterns, cinematic poster lighting",
  "color_palette": "deep indigo and black background, antique parchment gold full moon, bright red-orange lanterns, white and gold typography, small red accent marks",
  "main_visual": {
    "centerpiece": "huge glowing cream-gold full moon with rough circular brush texture and scattered gold paint flecks",
    "primary_calligraphy": "one enormous black kanji character '祭' painted across the moon in aggressive dry-brush strokes, with ink splatter and slight red shadow accents",
    "event_title": "large handwritten black brush script under the moon reading '[みなと夏祭り]'",
    "seal": "small red square hanko seal near the title"
  },
  "background": {
    "sky": "dark indigo night sky filled with gold speckles and ink-like texture",
    "fireworks_count": 5,
    "fireworks": [
      "very large red and gold burst in the upper left",
      "medium gold and magenta burst near the upper center-right",
      "large yellow and purple burst in the upper right",
      "small orange burst at mid-right",
      "small partial gold burst near the far upper-right edge"
    ],
    "decorative_patterns": "thin gold Japanese seigaiha wave patterns on the left edge and bottom-left corner, plus geometric asanoha lattice pattern on the right border"
  },
  "right_date_panel": {
    "position": "vertical dark navy strip along the right side with thin gold divider lines",
    "date_text": "vertical white Japanese text reading '[令和8年 8月15日(土)・16日(日)]'",
    "date_elements": [
      "8月15日(土)",
      "16日(日)"
    ]
  },
  "lower_information_block": {
    "position": "lower left, three horizontal rows divided by thin gold rules",
    "row_count": 3,
    "rows": [
      {
        "icon": "gold plum blossom",
        "label": "時間",
        "text": "[午後5時〜午後9時]"
      },
      {
        "icon": "gold plum blossom",
        "label": "会場",
        "text": "[港町中央公園 特設会場]"
      },
      {
        "icon": "gold plum blossom",
        "label": "内容",
        "text": "[盆踊り・屋台・打ち上げ花火(20時〜)]"
      }
    ],
    "typography": "clean white Mincho-style Japanese type with bold labels and slightly smaller details"
  },
  "lantern_scene": {
    "position": "lower right foreground on a diagonal festival rope",
    "lantern_count": 5,
    "lanterns": [
      "small partially visible red lantern near lower center",
      "small red lantern left of center-right",
      "medium red lantern center-right",
      "large red lantern right-center",
      "largest red lantern at far right edge"
    ],
    "details": "each lantern glows orange-red, has black top and bottom caps, black mitsudomoe crest, and gold-red wave pattern near the bottom; dark silhouettes of festival stalls and tiny warm lights behind them"
  },
  "footer": {
    "text": "small centered white organizer line reading '主催：港町夏祭り実行委員会'",
    "gold_brush_stroke": "diagonal gold paint slash near the bottom edge"
  },
  "composition": "large calligraphy and moon dominate the center, date information balanced on the right vertical strip, event details anchored lower left, lanterns add depth and warmth at the lower right; preserve generous dark negative space and premium festival atmosphere",
  "rendering_instructions": "make the Japanese text crisp and legible, use realistic ink texture for calligraphy, metallic gold splatter, soft moon glow, vivid fireworks, no people, no modern logos; designed as a polished promotional poster for a summer festival"
}