fLIPPIN HECK!!! im so glad im not a japanese solider during the war
but then again you have to look at there beliefs...
To die in battle serving your emperor was the most honourable death there was.
This stems way back to the ancient japan, look at the samurai if he lost his honor the only way to save there dignity was by seppuku..
the only way the samurai could die more honourable was to die in battle by a sword !!
so id guess that the japanese soliders didnt quite see it as suicide but more of an honor