Seiwa

Seiwa can refer to:


 * Emperor Seiwa, emperor of Japan
 * Seiwa, Mie, a district in Mie, Japan
 * Seiwa, Kumamoto, a village located in Kumamoto Prefecture, Japan
 * Seiwa College, in Nishinomiya, Hyōgo, Japan
 * Seiwa University, in Kisarazu, Chiba, Japan