The Asahi Shimbun has a separate Saturday edition called “Be on Saturday”.

Be, The Asahi
Every week they run a page of puzzles including sudoku which I have the impression is much more popular outside of Japan than here.

Sudoku on Be
Anyway I enjoy solving the puzzle every week. I was first introduced to it by a New Yorker when I was visiting his office. It coincided with the time when airlines started putting restrictions on carrying liquids and on the first day they went into effect, I was flying from JFK to LAX. Consequently there was a lot of waiting and killing time at the airport and that’s when I picked up this book.

Book of sudoku
I had put it away after coming home without having done much and had forgotten about it but it fell out of my bookshelf when the 3/11 earthquake hit. This week I’ve been doing page after page of sudoku and today I’ve been doing it non-stop. It’s taking too much of my time…