Well, in general, using examples from other articles will not be helpful, because there is a lack of consistency.  In fact, the article about Kodokan Judo is currently at Kodokan, and Itto-ryu is currently at Ittō-ryū.  Please be aware of the difference, though, between arts where the name of the martial art practiced (such as "judo" or "kenjutsu") is a part of the name of the school, and where it is just describing the school.  If it is part of the school's "official" name, it should be capitalized, and be included in the name of the article.  If it is not part of the school's official name, it should not even be part of the article's title, much less capitalized. Thus, I believe (and I could be mistaken) that Kodokan should actually be moved to Kodokan Judo, while Ittō-ryū should stay where it is.  A good rule of thumb might be, if you were to go to Japan, and look at the sign hanging over the front door, what would it say.  I suppose Itto-ryu might included "Kenjutsu" after it, but certainly any of the comprehensive koryu would have only the name of the school.  Daito-ryu, on the other hand, seems to clearly use "Aikijujutsu" as part of its name.  There's even a great old photo of Morihei Ueshiba from the 1930s, sitting in seiza in front of a sword stand and a hanging banner that reads (in kanji, of course) "Daito-ryu Aikijujutsu".

Regarding the hyphen in "aiki-jujutsu", I may have actually been the one to add that originally.  It's purely a personal preference issue.  There are no rules regarding hyphens in Hepburn romanization, their use is up to the judgment of the writer to include them wherever they help to improve clarity.  I felt that an English-speaking reader with no Japanese experience might have a hard time with "aikijujutsu", because all of the repetitive vowels kind of make the word blur together, and it is a logical place to break the word up, without making it look like two entirely separate words. Or putting it another way, it makes "aikijujutsu" readily identifiable as a compound word, and clearly shows the two root words.  I am not at all attached to doing it this way, though, and would have no problem with them all being changed back to "aikijujutsu", if anyone feels strongly about it.