秘伝
Noun
Noun
1
noun (common) (futsuumeishi)nouns which may take the genitive case particle 'no'
secret (recipe, medicine, etc.);mysteries (e.g. of an art)
内弟子とは師と寝食をともにし、あらゆる武術のノウハウと秘伝を伝える制度だ。
Apprenticeship is a system where you eat, sleep and live with your master and are taught various martial arts know-how and secrets.