My dad used to tell us kids that if we behaved badly the Japanese would invade and put bamboo in our ears and under our fingernails to punish us.
PS - Sorry to the Japanese people reading this, and we left my dad when I was 11.
A childhood belief about nationalities

others believed things like this
- I used to believe that if i behaved badly i would be taken away in a yellow van.— Mattio
- i used to believe that i am american.
i am japanese . — mayumi - My older brother made me believe that wristwatches were powered by tiny Japanese men inside them.— Outsider
- i used to believe that the rag and bone man would come and take me away if i wasn't well behaved— ambrosez
- i once beleived that if i did not eat any food, god would punish me— andria
- I belived what when i was peeing, a jellymonster would come out of my penis to punish me.— Shuyin