I'm not sure if it's Kaedo but it looks pretty weird (or was it Kendo?) with the black suits.

I want to learn the martial arts where you fight with a stick, what's the most done sport where you fight with a stick?

Preferably an ancient one

Are you talking about Jodo? i know thats a martial arts that involves fighting with sticks..

I believe he means Kendo. Jodo also fits that description, as mentioned by our friend. Do a Google image search for visual confirmation.

Yes, that's right, Jodo might also fit the description, but I also think our friend means Kendo, with the black suits and facial protection.
Kendo is the better known and most popular of the two.

I beleive you May be Thinking of Kendo(The sticks are kinda bambooish?).

You know what's cooler? kapwera! and counter strike! Because if you do both, you can be a hot nerd that has strong arms and all of the cool stuff.

Perfect!

Well, there's a stick weapon called a Bo, it's used in many martial arts, but mostly the ones from Okinawa...

I think nanchaku is much better than stick fighting. Remeber Bruce lee in Enter the Dragon, where he used to pair of stick joined by a chain to leash out his vengeance on the bad guys...boing chhuka boing...what a great movie

Unlike movies, however, it is not that easy to wield nunchucks. An amateur carelessly wielding a nunchuck poses grave danger of bruising in his lower arms, to say the least. Perhaps I'd rather not elaborate on the chances of an errant nunchuck fracturing its owner's arms, ribs or, worse, cranium.

We also have martial arts here that use sticks, actually, a pair of sturdy rattan sticks used as a blunt weapon. Arnis de Mano, as it was called also used to be done wielding two machetes, or similarly sized bladed weapons. Anyway, I should think a pair of unjoined sticks should be easier to wield than two sticks connected by a chain