The Japanese kids should clean their own class room by themselves. It's quite normal thing in our lives and kept from generation to generation.
It’s too normal for me to think the reason why until I knew it today. Actually, it comes from the Buddhism practice.
Buddha had a pupil who had a poor memory and he couldn't read or write any letters. So, Buddha ordered him just clean all day long, and every day. The slow but innocent and diligent boy tried as hard as he could. But how hard he cleaned, people got the rooms dirty and tiny dust piled on shelves and desks. Still, he kept cleaning day after day. Finally, one day, he had reached enlightenment. He found that he himself had dirt and dust in his mind and he cleaned them away.
In old days, people had no school like now, so temples were the place they could get knowledge and manners. Since then, cleaning is the basic practice for people who wanted to learn. I heard it today for the first time in my life, and I thought "really?! Does it have such a deep meaning?? Wow! "
Teachers and parents should tell their kids about this story more! You know that how hard to keep rooms, toilet, bathroom, and kitchen clean and how frustrated when kids or your partner got them dirty? The Japanese kids leaned nothing in cleaning time in school!
The pupil, why you could sweep away your frustration when you clean other's mess? I would never reach enlightenment as you.