常じょう灯とう明みょう

noun

continuously burning light; eternal flame

Typically refers to a lamp or candle kept perpetually lit at a Buddhist altar or memorial. The term is somewhat specialized and may not be widely known outside religious contexts.

• お寺てらの本ほん堂どうには常じょう灯とう明みょうがともされている。

  A continuously burning light is kept lit in the temple's main hall.

• 仏ぶつ壇だんの常じょう灯とう明みょうを絶たやさないように気きをつけている。

  I make sure the eternal flame on the Buddhist altar never goes out.