Hakkeijima Sea Paradise will be awash in blues, pinks and purples during its annual Hydrangea Festival, which boasts 20,000 hydrangeas in full bloom from the beginning of June. Watch the colourful spectacle at ten different spots on the man-made island, including the seaside garden, the hydrangea-lined walkway and slope. At night, the area around the hydrangea falls will be lit up with 130 bamboo lanterns, turning this spot into an ocean of vibrant colours accompanied by warm lights. Look forward to special hydrangea-related dishes and desserts at the Bay Market. Spending a day here makes the perfect start of summer.