The image of "bell flower or balloon flower" which is called "kikyou or kikyo" in Japanese. The flowers are normally in purple or white.
花鈴花
balloon flower、bell flower、Emblems and Insignia、kikyo、kikyou、plant、purple、yamachem
氣球花、鐘花、徽章和徽章、桔梗、桔梗、廠、紫色、Yamache米
資料來源：openclipart ( https://openclipart.org/ )