Electronic circuits have an aesthetic which come from their functionality. Similarly, the simple aesthetic of traditional crafts also result from the making process and its function. In this product, we used the traditional material Urushi lacquer as an insulator and the gold leaf as a conductor to create an electronic circuit. The combination of these material works as a sensor for water lighting up a LED. The information about the water inside of the bowl is transferred into a digital information. This piece suggests a new possibility of combining digital technology with that of the traditional craft industry.