also: ヤーヌス
noun
Janus (Roman god)
Refers to the two-faced Roman god of beginnings, gates, transitions, time, duality, doorways, passages, and endings.
ヤヌスはローマ神話の神で、前後二つの顔を持つ。
Janus is a god in Roman mythology who has two faces, one looking forward and one backward.