[mikazuki has no reason to think that tsurumaru is lost - and even if he did, he would just settle himself as a passenger anyway? it's fine.]

Mm - and your knowledge came from the exhibit relating to the Sengoku era, no? When reviewing Date Masamune's famed swords...?

Whereas I was reviewing Imanotsurugi and Iwatooshi, belonging to a different era.