Chinese - Kangxi should be the ideal choice. He was the Chinese Emperor to consolidate China, and expand its borders. More so, he is an iconic emperor that has reached almost a saint-like status in China.
Japanese - Ieyasu probably will be the the choice. He was a man of deep foresight, and was able take over Japan and at the same time out lasting such prominent men like Totoyomi Hideyoshi and Oda Nobunaga. Also because he would draw probably the most admiration from Japanese fans.
India - Akbar. An able warrior and administrator, who left an print in the very dynamic of the Mughal Empire. Moreover, his achievement bordered on both artistic, ethinic, intellectual, and militariy pursuits. Also, Akbar's name is probably the least blemished of the Mughal rulers, comparing to Jahan or Aurangzeb.
Anywy, I do believe the leaders of particular civilization can be guess. Aoe usually featre the most prominent and well known leader of a particular civilization.
[This message has been edited by Questio (edited 05-25-2007 @ 12:02 PM).]