expression
Tōhoku dialect greeting used in the evening, equivalent to standard こんばんは. Often used in casual conversation, emails, or messages sent during evening hours.
お晩です。今日は寒かったですね。
Good evening. It was cold today, wasn't it?
メールの書き出しに「おばんです」と書いてあった。
The email started with 'Good evening' (in Tōhoku dialect).