Just a different class of men back then. You see celebrities cry about being in the jungle for 2 - 4 weeks and having to sleep rough, (They conviently forget they are getting a whack load), whilst these guys saw it as their duty. Hats off to these guys who stuck to their duty for almost 30 years! Survivalist!
Devoted to what? Blind stupidity? It says a lot about the conditioning of the poor Japanese underclass. Afraid to leave their place of duty for 30 years in case they got ROP's. The CO's have a lot to answer for. Basteds!
Seriously, I've got a lot of time for the Japanese as a whole but there's no doubt that they went horribly wrong as a society during that time. Refusing to surrender rather than incur shame is just another side to the same coin as bayoneting civvies rather than incur it.