You are only partially right. Yes this is one of the arts that Hatsumisensei teaches shich he holds the sokeship meiko for. However Hatsumisensei only holds the meikogeiden for one of 9 Ryus (which should always be capitalized for respect) which you do have correct in your post. Many practicioners will tell you flat out that practicioners of Bujikan will not learn all skills/gates of any of the Ryus as it is a hybrid system. Hatsumisensei teaches only his senior students the full ninjutsu system. I find it personally sad that there are many students out there that don't even seem to know what I mean by the gates and skills.
Budo,
Okay, this is an old thread, I know, but...
As you are making a point about the correct way of presenting certain words (ryu, in this case), we might as well get a couple of things straight. The term for full trasmission, or msatership is Menkyo Kaiden, not "meiko" or "meikogeiden" as you commonly use. Not even sure if that is a word at all... And I have never encountered such a term as sokeship menkyo, as soke is generally considered to be above the menkyo ranking system. However, as menkyo simply means licence, you could look at the scrolls as being such, maybe?
The techniques of a particular ryu are known as kata, which becomes gata when placed after certain phonetic sounds, I believe you are writing "gate" and "gates" in this place? I would also point out that Japanese doesn't feature pluralisation the way English does, so it is one kata, or many kata, not katas (or, as you wrote, "gates").
As for capitalisation of terms, you stated that ryu "should always be capitalised, for respect", gotta disagree here. When used as a proper name, in a part of a school, then yes, by all means, capitalise it (eg. Togakure Ryu, Takagi Yoshin Ryu, Katori Shinto Ryu). But when used, as it was, simply as a word, then no. By the same token, we use the word school without capitalising ("Did you have a good day at school today?"), but when naming a school, that changes ("Where do you study?" "I go to Such-and-such High school"). Make sense?
I'm not sure what you mean when you say "Yes this is one of the arts that Hatsumi Sensei teaches which he holds the sokeship menkyo for. However Hatsumi Sensei only holds the menkyo kaiden for one of 9 Ryus..." Hatsumi Sensei is Soke of 9 separate systems, which he chooses to teach as an amalgamated system based on the teachings of each different ryu-ha, while focussing on one in particular from time to time. And while I'm on this part, the correct title is not Hatsumisensei, as it is not an extension of his name, but Hatsumi Sensei (2 seperate words). And I'm not sure where you get your information about what Hatsumi teaches "only his senior students", nor why you would feel it is "sad" that not all students of the Bujinkan (might be a typo, but I've seen it in a few of your posts - BujiNkan, not Bujikan) know all the kata. There are many schools which are so large that the students don't know all the techniques for them, either, in fact, in many classical systems, you may not learn the actual scroll techniques until quite a way down the path.