written all over someone's face

Phrase

idiomatic of an emotion

(idiomatic, of an emotion) Very obvious, from someone's facial expression.

Japanese Meaning

感情や考えが誰の顔にもはっきりと表れており、隠しようがない様子 / 表情から、その状態や感情が容易に読み取れること

At the concert, enthusiasm was written all over someone's face as they sang along.

コンサートで、誰かの顔には一緒に歌うときの楽しげな表情がはっきりと現れていた。

Sense（1）

(idiomatic, of an emotion) Very obvious, from someone's facial expression.