o-omi
/əʊˈəʊmi/ /əʊˈɒmi/(also o-mi) Now historical
noun
In early imperial Japan: the leader of all the heads clans or families claiming imperial ancestry (see omi, who served as the highest minister in the Yamato court until the Taika reform (646).
Origin
Early 20th century; earliest use found in Frank Brinkley (1841–1912). From Japanese ō-omi from ō- great + omi.