Karin
at first impressions just looks like a cute white cat. But he is actually a wise sage who is known to possess great knowlege and has access to divine powers and items. He lives on top of an extremely tall tower which only the strongest and braviest of warriors (cachers) dare to climb.
The cache for this container while not nearly being as tall as Korin tower in the manga, is hidden on top of a small peak. Finding the path to the top of the peak may be easy or hard depending on the time of the year. There are two water tanks nearby that are off limits so DO NOT climb the fence into that area. You will have to hug the outside of the fence for a while until you see a faint trail going away from the fence up to the top of the peak.
The ammo can is filled with goodies for kids and if your lucky you may recieve some sage advise or a divine item from Korin while you are there.
Good Luck!
Please hide the ammo can back the same way you found it.