Ni-to
The tsuba is used to bring the center of mass closer to the hand. So for one-handed technique you can simply use a larger tsuba than average, regardless of the length of the tsuka.
I do Shinto ryu kenjutsu as a part of the Shinto Muso Ryu and it makes use of both ni-to style and one-handed use of the odachi alone, as also featured in the jo-jutsu part of the curriculum. Supposedly, our sword style was influenced by our founder's friendship with Musashi. My teacher always emphasized that one should not depend on technique; training in technique is designed to give you flexibility of mind in combat and you should be prepared to "throw away" your weapon at any moment.
Be well.
jd
"Look, I'm only doing me job. I have to show you how to defend yourself against fresh fruit."
For it breeds great perfection, if the practise be harder then the use. Sir Francis Bacon
the world has a surplus of self centered sh1twh0res, so anyone who extends compassion to a stranger with sincerity is alright in my book. also people who fondle road kill. those guys is ok too. GunnedDownAtrocity