Amitabha is a buddha in Mahayana Buddhism and the principal buddha in Pure Land Buddhism. The deity is said to provide salvation to people with its infinite light (wisdom) and infinite life. From one of its forty-eight vows, it was interpreted that anyone would be guided to his Pure Land if they chanted his name, which resulted in Amitabha becoming widely worshiped in Japan. The pose with the hands represents the Amitabha taking people to the Pure Land. Like the Buddha, or Gautama Buddha / Shaka, he is not wearing accessories of any kind
The Kirikane (截金 or 切金) technique has been used for this statue. This tehcnique is a traditional Japanese decorative technique used for Buddhist statues. It uses gold leaf, silver leaf, or platinum leaf cut into lines, diamonds, and triangles, resulting in a both delicate and splendid appearance of the Buddhist statue.
This Buddha statue has small celestial beings in the aura. These beings are flying around the Buddha statue and celerating the Buddha. This type of aura is called hiten (飛天) and is typical amongst Buddhist sculptures.