It's called the Japanese Self-Defense Force (JSDF) because it needs to be very clear it is only for self defense. It's not an army, because Japan is not allowed to have an army due to the constitution Americans penned after WWII. But I mean walks like a duck, talks like a duck... and that's why this video exists apparently. To make it clear why the JSFD is needed and all the good things they do. All in all it's pretty awesome that even a pseudo army put out a cool anime like this. It's not the first time they've gotten cute, with previous moe girl characters used for recruiting. And if you don't have 18 minutes to watch it, I suggest you go to 1:15 - 2:05 for the best minute of the video; so suspenseful. Also 2:55 - 3:05 to see Bo-Emon's magical appearance.