also: じんみらいざい
adverb, noun
for eternity; forever and ever; to the end of time
A Buddhist term meaning 'throughout all future time', often used in vows or solemn expressions. Literary and somewhat archaic in modern Japanese; more common in religious or poetic contexts.
尽未来際、この誓いを守り続けます。
I will keep this vow for all eternity.
尽未来際にわたる慈悲の心。
A heart of compassion that extends to the end of time.
From Buddhist terminology, composed of 尽 (exhaust), 未来 (future), and 際 (boundary/limit), literally 'to the limit of all future time'. The exact historical derivation is uncertain, but it is a set phrase used in sutras and vows.