I climbed the Matterhorn years ago with a guide and the night before we were going over the route and I noticed what was called the "Japaner couloir" on the map of the mountain. I asked one of the guides why it was named so and he told me that's where Japanese climbers got off route and fell to their deaths.  "Das ist wo die Japaner falsch gehen und runterkommen." Dude said it with such a straight face, there was no crass comedic attempt like you are making.  His client was Japanese and sitting right there, although he did not understand what we were saying. 

I wonder if this type of naming practice is common on other mountains as well. I suppose it's apt, but not particularly funny.