Like Brian said, regular seppa(s) were used fitted with little tsuba (usually 3 or 4 milimeter thick) which protruded just a little form the seppa(s).
You had also a corded handstop on the shaft and one or two small rings on the shaft too.
You can also take into account a distinctive and scarce feature about the shaft. Real naginata made for fighting had a distinctive characteristic on the shaft. I am going to try to explain that correctly. The shape of the cross-section is usually round or ovoid, but on the side of the cutting edge of the blade you had a line carved in the wood of the shaft in its whole length which permit the user to know, by night, where the cutting edge was, it is refered to pear shape shaft.
You can also find hirumaki (which were fitted at the end of the shaft) on ebay (beware of fake ones) their shape is different from the ones used for yari.
I recommend the book Japanese POLEARMS written by Roald Knutsen. You will get a lot of info from it.