Japanese Summer Festival Poster Design

{
 "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_count": 2,
 "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, no photographic realism; designed as a polished promotional poster for a summer festival"
}