Since these six letters are the names that Hozo bosatsu (the name of Amida Buddha when he was conducting ascetic practices (Ini, or not yet reaching Satori (enlightenment)) received after conducting ascetic practices and reached Shogaku (true enlightenment), it is also called 'kago.'
この六字は、すなわち法蔵菩薩（阿弥陀仏の修行〈因位〉時の名）が修行し、大願大行を成就して正覚を得た上の名であるから、「果号」とも呼ばれる。