Akshobhya; the Immovable Buddha
Buddhist term referring to one of the Five Wisdom Buddhas, associated with the east and the mirror-like wisdom.
Akshobhya Tathagata is said to dwell in the eastern Pure Land.
Mixed kana spelling; 閦 is a rare kanji, so this form may be used for readability.
From Sanskrit Akṣobhya, meaning 'immovable' or 'unshakable', via Chinese 阿閦.