The Type 94 Nambu, the most ridiculed pistol in history.
The Type 94 was intended to supplement the Type 14 in Imperial Japanese military service. It was intended to be issued to pilots and vehicle drivers because of its smaller size. The Type 94 was also supposed to address some of the Type 14s short comings. Other then being a smaller frame pistol and less expensive to produce, the Type 94 was hammer fired making it more reliable in combat service. The Type 94 was will liked by those Imperial Japanese soldiers who carried them and was perfed over the Type 14, due to its smaller size and reliability.
The only real short coming of the Type 94 that I can see in combat, other then the exposed sear. Is the the Type 94 only held six rounds of 8mm Nambu. 8mm Nambu is not exactly the most powerful service cartridge on the planet, closer to .380 in comparison.
As for being able to fire the pistol by pressing the exposed sear, that is true. Unfortunately this has given the pistol a terrible reputation in the collecting community. It was never intended to be designed that way as a "last surprise," when surrendering to Allied Forces. Yes, it could be dangerous to the user if handled incorrectly, but that is where Imperial Japanese Military training would come into play.
Over all an interesting piece of World War 2 history.