I have played through the game several times already and I cannot find these illusive items. I want to get the specialty chips in Karin's shop.

I've looked through the guides and can't find a trace of info that I'm looking for.

there is a gold one at orouchmarus hideout

the silver kunai are stored off to the side in a few of the missions. i know that theres one on the mission where you look for the director you have to go back up the stairs at the entrance to the lake right after the cutscene. i think theres another in the sand mission behind one of the screen things that fall when you hit em

ok i will tell u were the gold and silver exactly are

1) Sasuke Pursuit: Right next to the save scroll there is a chest. Inside is the Silver Kunai.

2) Trouble in the Sand: After the part with the boxes. When you reach the area where you have to up the stairs, instead go back through the opening where you came from (but do not go back into the area with the boxes). Search around a bit and you'll see the chest with the Silver Kunai.

3) Stuntman: After you finally gain control of Naruto, head back to the entrance of the cave (tree). You will see the chest containing the Silver Kunai.

4) Closed for Business: When you get to the part when the timer starts and you have to break that huge boulder to proceed, look left of the boulder. The Silver Kunai is in the chest.

5) Mass Dissapperances: When you are able to climb up to the houses for the second time, there is a wall before you proceed down the hallway. Break down that wall to encounter 1 Sound Ninja and 1 Chest. The chest has the Silver Kunai.

Gold:

Final Battle: When you arrive at the part where you have to go up the slope and are being shot by those 3 Kunai firing machines (the first set), instead make a 180 degree turn and head towards those set of rocks that you can hit but never break. There is a chest right next to them containing the Gold Kunai.