Cao Kusa Grass in Chinese / Japanese...

草 means grass or straw in Chinese, Japanese Kanji, and old Korean Hanja.

Depending on the context, this can also mean a manuscript, draft (of a document), or rough copy. In the botany context, it can also refer to weeds, herbs, thatch, or plants.

草 is also the first character of caoshu or sōsho, the Chinese and Japanese wild cursive script style of calligraphy.

Sometimes written in variant form 艸.

This can be the surname Sou/Sō, or the given name Kusa in Japanese (there are also other romanizations for this Kanji).