This ain't nature, and you won't get to see the sunrise in a humid country outside of autumn or winter.
I have got up at three-thirty to climb a mountain. It's called an 'alpine start', except the difference is that in mountaineering it is not done on the minuscule chance that it won't be so humid that the haze will block the sunrise, but so we don't die. Glaciers are safer to cross using crampons on a frozen surface. We also do not wake up everyone in the camp, or mountain hut, both because we are not fucking assholes, and because we do not want to be beaten the shit out of. Lucky you outnumbered me... I am supposed to be open minded and even handed, but you wouldn't give a seat to my pregnant wife, step into the path of my baby carriage exiting the train, and this: fuck you, Japan! Of course, not all Japanese are this stupid: the friend I was hiking with was as pissed as me. That's why he's my friend, and you are dickheads.
So do you know what you can do about the rule to camp in designated areas? Fuck it, since I won't get a night's sleep there. Neither will camping on the summits be the solution, as I have done, since you'll still wake me up at four-thirty. Get daylight saving for Christ's sake.