When Shoga (ginger) and Myoga were imported from the Asian continent, those with a strong fragrance were called Senoka (strong fragrance) and those with a weak fragrance were called Menoka (weak fragrance).
大陸からショウガとともに持ち込まれた際、香りの強いほうを「兄香（せのか）」、弱いほうを「妹香（めのか）」と呼んだ。