Amitābha (Sanskrit: अमिताभ, Amitābha (wordstem), Hindi pronunciation: [əmɪtaːbʱə]; Amitābho; Chinese: , Ēmítuó Fó; Japanese: Amida; Tibetan: , Ö-pa-me) is a celestial buddha described in the scriptures of the Mahāyāna school of Buddhism. Amitabha is the principal buddha in the Pure Land sect, a branch of Buddhism practiced mainly in East Asia. According to these scriptures, Amitābha possesses infinite merits resulting from good deeds over countless past lives as a bodhisattva named Dharmakāra.
"Amitabha" is translatable as "Infinite Light," hence Amitabha is often called "The Buddha of Infinite Light." According to the Larger Sūtra of Immeasurable Life Amitābha was, in very ancient times and possibly in another realm, a monk named Dharmakāra. In some versions of the sūtra, Dharmakāra is described as a former king who, having come into contact with the Buddhist teachings through the buddha Lokesvararaja, renounced his throne. He then resolved to become a buddha and so to come into possession of a buddhakṣetra ("buddha-field", a realm existing in the primordial universe outside of space time, produced by a buddha's merit) possessed of many perfections.
These resolutions were expressed in his forty-eight vows, which set out the type of buddha-field Dharmakāra aspired to create, the conditions under which beings might be born into that world, and what kind of beings they would be when reborn there. In the versions of the sutra widely known in China, Vietnam, Korea and Japan, Dharmakāra's eighteenth vow was that any being in any universe desiring to be born into Amitābha's Pure Land and calling upon his name even as few as ten times will be guaranteed rebirth there. His nineteenth vow promises that he, together with his bodhisattvas and other blessed Buddhists, will appear before those who call upon him at the moment of death.
This openness and acceptance of all kinds of people has made the Pure Land belief one of the major influences in Mahāyāna Buddhism. Pure Land Buddhism seems to have first become popular in northwest India/Pakistan and Afghanistan, from where it spread to Central Asia and China