Ukiyo-e Hamster Summer Postcard

Create a nostalgic Japanese summer greeting-card illustration in a traditional ukiyo-e / shin-hanga watercolor style. The scene shows one adorable realistic hamster as the central subject, standing on a shaded wooden veranda by the sea, wearing a wide straw hat with a blue ribbon and holding a clear blue glass ramune soda bottle with the label “ラムネ” and smaller text “冷やしの味”. The hamster has warm golden-brown and cream fur, glossy black eyes, tiny pink nose, small open smiling mouth, and soft detailed whiskers. Behind it is a bright summer beach landscape with turquoise ocean waves, sandy shore, one small white sailboat, distant green hills, and a seaside town with tiny houses. Frame the top with dark bamboo blinds and hanging cords, and place a glass wind chime at upper left containing exactly two orange goldfish; below it hangs a rectangular paper strip reading “涼風至”. Include exactly two main morning glory flower clusters in the foreground, one at lower left with blue and purple blossoms and one at lower right near a folded paper fan with floral patterns. Add a wooden sign on the right reading “名勝 海水浴場”, and a vertical label at bottom left reading “日本の夏”. In the sky area, write vertical calligraphy “暑中お見舞い申し上げます” with a small red smiling sun doodle nearby and a red seal stamp containing “大正十五年 夏”. Use aged cream paper texture, faded ink, visible grain, rough deckle border, muted vintage colors, soft natural light, and delicate hand-painted linework. Keep the composition square, cozy, whimsical, and authentically Japanese, with all text integrated as hand-brushed calligraphy and no modern objects besides the retro soda bottle.