Hydrangea ( ajisai) on a rainy day in Tsukuba Japan's month long rainy season (tsuyu, ??) usually ends in mid-July, and that means there are precious few days left to savor its SPECIAL BEAUTY. Many Japanese consider Ajisai (???, or hydrangea) to be the quintessential flower of this season, as they look just right when wet, and enshrouded in mist.