For those who like trivia, the name Su Doku is an abbreviation.
I found this whilst surfing:
Original name of Su Doku is;
Suji ha dokushin ni kagiru
Which means; 'We like better the number is single'.
lobby__boy wrote:"Doku", if my learning (extremely miniscule) serves me correct can also mean 'poison' and "su" means 'number', so it's a double entendra (sp?), meaning either 'number isolation', as previously stated, or 'number poison'