ObaraJapanese It's written like : 小 (O meaning small) and Bara meaning "Plain". Masakazu Obara's last name is pronounced like this. He is an anime director, he worked on Accel World.
OkuJapanese From Japanese 奥 (oku) meaning "inside; inner depths". It is a reference to an event in the Northern and Southern Courts Period, of 3 sons of Takase who became heroes for the south. The emperor of Japan awarded each of the sons a new surname; Oku for the eldest son, Naka for the middle son, and Kuchi for the youngest son.... [more]
OkuhashiJapanese Oku means "inside, interior" and hashi means "bridge".
OkuiJapanese Oku means "interior, inside" and i means "well, mineshaft, pit".
OkukawaJapanese (Rare) Oku means "interior,secluded,further out" and kawa means "river". Minako Okukawa is a fictional character from Yuri!!! On Ice and it's also the name of a company.
OtsuJapanese O means "big, great" and tsu means "harbor, seaport".
ŌtsuboJapanese From Japanese 大 (o) meaning "big, great" and 坪 (tsubo), a traditional unit of measurement equivalent to approximately 3.306 square metres.