Well Katanas come in a lot of different varieties (if ou ask thoose that makes them, normal people refer ((as I do mostly
) as only katanaīs).
You have the curve of the blade changed from mounted or ground wielding. The hilts length also is depending on how it is too be used.
The longer katanas are called Dai-katana (ye ye, itīs a game too
)...
There are also alot of different styles in the art offighting with Katana. Mot known to us is Iaido and Kendo. This are the more general forms of fighting with Katanas. Some sholls specialized in fighting two handed, the most common way to fight since shields arenīt as common as in western countries.
Some wielded both the Katana and their Wakisashi. and some wielded two Katanas at the same time. This is the most difficult way and also not as common since it is impractical unless you are very good at it.
To read alot more info which is interesting and also a good and informative comic, see Lonewolf and Cub, a god and informative comic about the Samurais and their time. Also there are alot of good books on this issue and also there is a book named something like" The art of making the blade live" A book that describes certain swords of different ages and different cultures!
So well wield them how you want to, as long as you do that which you are supposed to do!
Remeber that one person beat all his opposition using one or two Bokkens!!!
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WOLF WINS EVERY FIGHT BUT ONE, AND IN THAT ONE, HE DIES