紫陽花, or hydrangea. One of my favourite flowers. I bought a pot two years ago for Lunar New Year. The flowers withered away a few days later. Now the plant is still thriving but it has not flowered since. Likely the climate is not conducive for it to flower.
I read their flowering season coincides with Tsuyu (梅雨), rainy season in Japan. Will need to brave the rains and the humidity if I want to see them in bloom. Oh, but the photos shared online are just so captivating. (*^0^*)