Search gender: all male female オウコ Japanese Boy Names Variations. 1 names found. gender: all male female Name: oko Katakana: オウコ 0 Kanji: 桜虎 Meaning: 桜Cherry blossom. A small deciduous tree of the rose family. The language of this flower is "spiritual beauty" and "a good education". 虎Tiger. A metaphor for something as strong as a tiger. A drunkard. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > オウコ Japanese Boy Names Variations.