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Minimalist ultra-high-resolution travel sketch poster of Omotesando, Tokyo, on clean white sketchbook paper with subtle paper grain texture. Style: refined pen drawing + loose watercolor sketch. Delicate black ink linework, airy watercolor washes, elegant urban details.

极简主义超高分辨率东京表参道旅行素描海报，呈现于干净的白色速写纸上，带有细腻的纸张纹理。风格：精致钢笔画 + 随性水彩速写。细腻的黑色墨水线条，轻盈的水彩渲染，优雅的城市细节。