This Daitokuzi bowl is made of thick brass. The brown color is created by the use of a Japanese lacquer called Urushi. Daitokuji is name of well known Japanese temple in Kyoto.
Daitokuji (大徳寺) is a large walled temple complex in northern Kyoto. It is the head temple of the Rinzai sect's Daitokuji school of Japanese Zen Buddhism. It is one of the best places in Japan to see a wide variety of Zen gardens and to experience Zen culture and architecture.
They say that this style bell was first used in the famous Japan temple of Daitokuji.
But, in fact, there are many temples with the same name -Daitokuji - in different prefectures in Japan.
To tell the truth, we do not know that this name comes from that specific Daitokuji temple. But we do know that the name of this style bell is well-known by the Japanese people.