オランダはっかオランダはっかMeanings1nounspearmintusually written using kana aloneRefers to the plant Mentha spicata, commonly called spearmint. Often used in cooking, teas, and flavorings.See also: スペアミントオランダはっかはガムや歯は磨みがき粉こによく使つかわれる。Spearmint is often used in gum and toothpaste.庭にわにオランダはっかを植うえた。I planted spearmint in the garden.