AI Prompt for Vintage-Style Hakodate Travel Poster with Japanese Typography

"{"type":"vintage minimalist travel poster","format":"vertical portrait poster","style":"clean black ink line art on warm ivory paper, architectural engraving, precise thin outlines, no color except dark brown-black typography, high detail city perspective, nostalgic Japanese tourism poster aesthetic","main_text":{"top_headline":"{argument name=\"headline text\" default=\"HAKODATE\"}","subtitle":"{argument name=\"Japanese city subtitle\" default=\"北海道 函館市\"}","bottom_country":"{argument name=\"country text\" default=\"JAPAN\"}","bottom_region":"{argument name=\"region text\" default=\"日本・北海道\"}","footer_line":"MINIMALIST LINE ART | TRAVEL POSTER SERIES | 函館市観光 | EST. 1854"},"scene":{"location":"Hakodate, Hokkaido, Japan","view":"straight-on one-point perspective looking down a wide urban street toward a mountain and a central observation tower","background_landmark":"Mount Hakodate drawn with contour lines behind the city, with a tall observation tower centered in front of it","street":"tram tracks running down the center, overhead utility wires crisscrossing both sides, dense mid-rise buildings with shopfronts and vertical Japanese signs","vehicles":{"count":7,"items":["one vintage streetcar centered in the foreground on the tracks","two cars in the left roadway","three cars in the right roadway","one small distant car near the center"]},"bicycles":{"count":3,"items":["one cyclist riding at the lower left","one cyclist crossing near the lower center","one cyclist near the lower-left street edge"]},"pedestrians":{"count":18,"description":"small simplified people walking on sidewalks and crosswalks, some carrying bags and umbrellas"},"major_visible_signs":{"count":8,"labels":["函館函館朝市店","ラッキー・ピエロ","十字街 距離山3km","金森赤レンガ倉庫","市芸術 市芸術","協會停留所","函館","MINIMALIST LINE ART | TRAVEL POSTER SERIES | 函館市観光 | EST. 1854"]}},"composition":{"top":"large bold condensed sans-serif HAKODATE title occupying the upper quarter","middle":"Japanese subtitle centered under the title, then detailed line-art city illustration","bottom":"bold JAPAN label, Japanese region line, and small footer text","mood":"orderly, elegant, touristic, retro-modern","paper_texture":"subtle aged cream background with slight grain"},"instructions":"Create a crisp monochrome illustrated poster with immaculate typography, balanced margins, and highly detailed but minimalist line work. Keep all text sharp and centered, with the city illustration framed symmetrically below the title."}"