I heard cans of beers explode because of the altitude on top mt fuji. is this true?

Question:

heading up in a few hours, planning to take a 6 pack with me

Answer:

No. That's a load of crap. Think about it. If the pressure were that low, what would happen to your body?

It's okay to climb to the top of Fuji. Not a walk in the park but allowable.

http://www.japan-guide.com/e/e6901.html

Now, could the cans freeze and explode? Not if you are climbing during what is considered 'climbing season'. If you are climbing at other times the chance of cans of beer freezing goes up. Freezing solid enough to explode? Not likely. But exploding cans of beer would be at the bottom of your list of problems in such a case. You'd be climbing out of season. Maybe way out of season.

Reminds me of a sign I saw at the top of a Black Diamond ski run in Vermont, supposedly the steepest slope in the east. It said...

Advanced skier?
You better be.

That applies to hiking Mt. Fuji out of 'climbing season'. This guy is going a little early but isn't going to find his cans of beer exploding.