"Igusa" is a perennial plant of the family of "igusa". "Igusa" smells good. It has a fresh, grassy smell. In English, they are called rushes. "Igusa" blooms from May through June. The plant grows up to a length of 100 centimeters or less. They grow in marshes where sunshine is good. In Japan, there are 30 kinds of "igusa" growing in many different areas.