Search gender: all male female モグサ Japanese Girl Names Variations. 1 names found. gender: all male female Name: mogusa Katakana: モグサ 1 Kanji: 百草 Meaning: 百Hundred. Kanji character for the number 100 (hundred). An example of a large number. A lot of things. 草Grass. The beginning of something. A draft of a poem or text. Rough. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > モグサ Japanese Girl Names Variations.