Looks like things are taking on an interesting turn, thanks to lexico and RockLee! (Hi, lex! Long time no write!

)
From what has been discovered, I think lexico's right about 血気の勇
It means "a show of courage in rashness/spur of the moment", and lexico has the source right. Sangokushi (Romance of the Three Kingdoms) is a favorite among the Japanese and has been made into manga/animation series. My son read the entire manga series when he was in elementary school.
Regarding 武じーと, I'm sure no native-speaking Japanese in his/her right mind will write that--unless lightdragonlee had copied it incorrectly.
I think the first bar is not kanji for the numeral one but just ornamental. The second bar after 武じ may be the same, but that puts と out of place...
Also, there is something I found on the Web that should be of interest to lightdragonlee... They are the five princples of Bushido (written in Japanese). Look at No. 5. Does it look like what is written on the sword?
The Spirit of Bushido
Hope it helps some!