TOKYO — Maki Kaji, the creator of the popular numbers puzzle Sudoku whose life’s work was spreading the joy of puzzles, has died, his Japanese company said Tuesday.... Two years later, Japan rediscovered its own puzzle as a “ gyakuyunyu, ” or “ reimport.” Kaji was chief executive at his puzzle company, Nikoli Co., until July and died Aug.... Sudoku championships have drawn some 200 million people in 100 countries over the years, according to Tokyo-based Nikoli....