Meaning: うすいらしいですadj. (Kanji=薄い) thin, weak, watery, dilutedn. (Kanji=雨水) (in Japan) "Usui", one of the Nijushi Sekki seasonal periods when the snow melts and plants bud (around February 19th); rain water, water that falls as a result of condensation from the atmospheren. (Kata=ウスイ, Kanji=臼井) Usui, Japanese family namen. (Kata=ウスイ, Kanji=薄井) Usui, Japanese family namen. (Kata=ウスイ, Kanji=碓井) Usui, Japanese family name