Obuchi小渕Japanese Combination of the kanji 小 (o, "small") and 渕 (淵, fuchi, "abyss, edge"). A famous bearer of this surname is Japanese Prime Minister Keizō Obuchi (小渕 恵三; 1937–2000).
Ochiai落合, おちあいJapanese From Japanese 落 (ochi) meaning "fall, leave behind, drop" and 合 (ai) meaning "fit, suit, join".
Ōtsubo大坪Japanese From Japanese 大 (o) meaning "big, great" and 坪 (tsubo), a traditional unit of measurement equivalent to approximately 3.306 square metres.