In the Jap-Kob we practice with the Jo and Bo staff.
As with all our kobudo, a stick is sometimes not a stick, but represents a blade.
The Yari is the Japanese spear, a thrusting and stabbing weapon.
The Naginata is a halberd, a slashing and cutting weapon. (If you've never seen one, imagine a sword blade on the end of a staff.)
So some of our Jo and Bo practice incorporates Yari and Naginata.
There is also a Chinese spear in Kung Fu, which has it's own distinct use.
Kali also contains a sword called the Kampilan, a spear called a sibat, and a hybrid kind of halberd, all of which we cover in our largo training.