Asahi-Net
www.asahi-net.or.jp/~gi5j-uehr/puzzle/
Fuji NumPlace
www.pro.or.jp/~fuji/java/puzzle/numplace/book2/index.html
Japanse Sudoku Blog
numpla.asablo.jp/blog/
Nadako
www.nadako.com/np/
Okazaki
www.okazaki.gr.jp/news/sudoku.html
Pori2
www.pori2.net/puzzle/sudoku/index.html
Rakugo
homepage3.nifty.com/rakugo/java/number/number.htm
Takana
www.takana.info/numberquest/index.htm
Takinogawa
www.geocities.jp/takinogawa001/numberplace.htm