くのいち"Kunoichi" translates to "female ninja" in English.

775→

"Why is it called 'kunoichi'? The role of kunoichi refers to female ninjas. Breaking down the kanji for 'woman' ('女') into 'ku,' 'no,' and 'ichi,' this name was given, but it seems that this name also served as a code."

密教では
女人はくのいちの如く
密儀で現る。
"In esoteric Buddhism, Women manifest as kunoichi In secret rituals."