genius

On-Yomi: サイ

Koohii stories:

1) [dwhitman] 31-10-2007(143): Spinal tap: "Every other band's amps go to ten. But you see my extra stroke of genius - these go to eleven.".

2) [johnzep] 29-6-2008(133): A TEN year old had a STROKE of GENIUS and wrote this joke: 何歳ですか? 。。。天才です! .

3) [osaki] 20-6-2007(52): Ten is ten, but add a stroke of genius and…

4) [theasianpleaser] 20-1-2009(48): Oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo! Genius!

5) [ziggr] 7-9-2006(24): I use Azumanga Daioh's Mihama Chiyo-chan for this. Not only is this character "genius", but it is also the simplified "years old" counter, one which children use instead of 歳 . I can imagine Chiyo-chan saying: 「十才ですよ」 "I'm ten years old." Ten-year-old genius? 十才天才 .