The Twelve Kingdoms: The Vast Spread of the Seas

Higashi no Watatsumi Minami no Soukai
東の海神 西の滄海

Prequel

novel
1993
Born in Japan and raised as a human, Taiki is overwhelmed when he's brought back to the kingdom of Tai, where he's told he's a kirin. With little knowledge or guidance, he must trust his latent instincts to choose a king for the Kingdom of Tai from among dozens of men and women who seek the position. Will the frustrated Taiki, who can't even figure out how to transform into animal form, make the right choice? And more important, will he discover the kirin that lives within?(Source: TOKYOPOP)

Sequel

novel
1994
After a year of depending on her ministers to govern the kingdom of Kei, Yoko follows Keiki's advice and descends the mountain to live among her people, eager to learn how to be a better leader from the village’s wise-man, Enho. However, when Enho is kidnapped, Yoko finds herself thrust into an all-out war between the kingdoms. Friendships and alliances are put to the test during the Battle of Wa Province. Can Yoko summon the strength to take up her responsibilities as king?(Source: TOKYOPOP)