The Stunning Contrast of Blue and Yellow at Yanagawa Sunflower Park Yanagawa Sunflower Park in Yanagawa City spans approximately 5 hectares and features around 500,000 sunflowers in full bloom from early to mid-September. Located on reclaimed land along the shoreline facing the Ariake Sea, the towering sunflowers can reach heights of about 120 cm, creating a striking contrast of yellow against the clear blue sky. Last year, the park was illuminated from dusk until 8:30 pm, offering a magical atm