Hot answers tagged katana
Major categories that I am aware of (expanding slightly on Sardathrion's comment): Iaijutsu (居合術) and Iaido (居合道) are the art of drawing the sword. Iaijutsu, theoretically, prefers more practical application while iaido is closer to an internal martial art, but you'll find schools under both names that exist along a bit of a continuum. Kenjutsu (剣術) is ...
Sorry if this is a vague answer, and I don't know the first thing about the Seido karate style, but I remember an instructor (I can't remember what style. Kajukenbo, perhaps?) at a martial arts camp once telling me that they only taught weapons at black belt level to avoid weapons bias. The idea was that a practitioner should be fully proficient in empty ...
There are a few forms in Tenshinsho-den Katori Shinto ryu. I know they exist, but was not able to progress to that level in my local school. Here is a link to a video of the style. https://www.youtube.com/watch?v=o2xmfyZSn80
Many ninjutsu and related arts like To Shin Do have weapons classes open to all from the beginning, some even incorporate weapons training into regular classes as well. Look at your friendly neighborhood band of ninjas to see. :)
As Sean said, nito ryu teach the way to fight with a katana and a wakizashi, but in real fight, on a ground battle, a samurai could use those technique with a second full sized katana. I practised it and i don't remember any technique which wouldn't work with two katana. There is some Kenjutsu Dojo that are able to teach it if you wanna try it
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