The inscription on the Okita family grave stone states that he held menkyo-kaiden (a document handed down by a teacher to the student he believes is most capable of carrying on his art) for the Hokushin Itto-ryu school as well as Tennen Rishin-ryuu.
また、沖田家累代墓碑には天然理心流の他、北辰一刀流の免許皆伝を得ていた旨も記されている。