@ultimatehaki well maybe Japan's so safe that they just left the door like that when they're at home (except during nighttime), I was like that too. Here it's pretty safe that a lot of my neighbors just left theirs door unlocked during daytime when they're at home (me too included) some even left their front door open. I always wondered why there's no thief or something like that, is it because it's too easy so the thief won't come because it's not even challenging for them?