Save Type Surname Usage Japanese (Rare) Scripts 相馬(Japanese Kanji) Pronounced Pron. sou-mah [key] Other Forms FormsSōma, Soma Meaning & History Sou (相) means "appearance, nature", ma (馬) means "horse". Souma is also a city name in Fukishima prefecture. Mitsuko Souma (相馬光子) from Battle Royale bears this surname