Hamon is a clock made of a flat round chinaware and water. The hands of the clock rotate and gently ruffle the water every second. The behavior of the water surface is a continuous overlap of the ripples produced from past to present. The uniqueness of this clock is to show not only the present time but also the accumulation and attenuation of time which is indicated by the water surface changing every moment. Hamon is named after Japanese word 'hamon', which means ripples.