Search gender: all male female Michiumi Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: michiumi Katakana: ミチウミ 0 Kanji: 通海 Meaning: 通Passage 海Sea. Wide and large. A place where many people and things gather. A large lake or pond. A large lake or pond. A frontier. The end of the earth. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Michiumi Name Meaning, Kanji Variations.