The Type 14's firing pin extension isn't truly hardened.
The IJA knew this, and issued two per pistol 'just in case' and never really addressed the problem, since they didn't view the weapon as a frontline combat weapon - they viewed it as more of a 'badge of rank' for those whose jobs required them to 'direct' rather than 'engage', and Officers had their katanas for that, anyway, since those were the more honorable weapon.
Using that logic, they worked well for the purpose.
If you're shooting it very often - you've probably shot more rounds through it yourself than were fired since it was built and throughout the war.
What ammunition are you using and does it exceed the known factory specs of the IJA?
Scouts Out!