As I understand, Japanese numbers are divided into blocks of four, so while we would think of the number 89123889 as 89,123,889, in Japan they would think of it as 8912,3889 (八千九百十二万三千八百八十九). So ...
Most people who've taken a Japanese 101 class know the 10 native Japanese numbers (一つ、二つ・・・十). It's always seemed odd that a system would stop at 10 when so many things in life need larger numbers. ...