However, despite being a period when Japanese swords were everyday items, Norimune swords were extremely valuable old swords, and it is believed that, from an economical point of view and from the necessity of having to use it often in actual battles, Okita would hardly have been likely to own one, although the matter has hardly been discussed among researchers.
しかし則宗作の刀は、日本刀が常用されていた当時でさえ非常に貴重な古刀であり、経済的にも実戦で多用する必要性からも沖田が所有した可能性はほとんど無いと推察され、研究者の間で取り上げられることはまず無い。