good form

UK uncountable

(chiefly UK) Behavior that is both morally and socially correct; proper manner, decorum or etiquette.

Japanese Meaning

道徳的かつ社会的に正しい振る舞い、品位、礼儀正しさ / 適切な行動やマナー、エチケット

It is considered good form to send a thank-you note after an interview.

面接の後にお礼状を送ることは礼儀正しい振る舞いとみなされます。

Sense（1）

(chiefly UK) Behavior that is both morally and socially correct; proper manner, decorum or etiquette.

The queen is a model of good form.