表明

statement, declaration (of one's position or intention)

ç o̞ː m e̞ː
表 outside; outdoors + 明 bright; clear; next day’s
noun Rare #41,139
statement, declaration (of one's position or intention) Often used in formal contexts, especially in compounds such as 辞意表明 (an announcement of intent to resign).
JA: 彼の反対表明は意外だった。
EN: His statement of opposition was unexpected.

この手紙で彼は辞意を表明している。

In this letter, he announces his resignation.

市長は近く辞意を表明するだろう。

The mayor will likely announce their resignation soon.

反省の表明?

An expression of remorse?

— 君の名は。 (2016)

あなたがこの町にしてくれた事に対して心からの感謝を表明します。

I would like to express my heartfelt gratitude for everything you have done for this town.

Sounds similar to