The Siddham script is a descendent of the Brahmi script and an ancestor of the Devanagari script. The name Siddham comes from Sanskrit and means "accomplished or perfected". The Siddham script is mainly used by Shingon Buddhists in Japan to write out mantra and sutras in Sanskrit. It was introduced to Japan by Kukai in 806 AD after he had studied Sanskrit and Mantrayana Buddhism in China. In Japan the Siddham script is known as 梵字 (bonji).