Polite to Colleague
Workplace · Greeting
今月もどうぞよろしくお願いいたします。 — I look forward to working together again this month. (Workplace · Greeting, Polite to Colleague, JLPT N4)
You
今月もどうぞよろしくお願いいたします。
こんげつもどうぞよろしくおねがいいたします。
I look forward to working together again this month.
Romaji: Kongetsu mo douzo yoroshiku onegai itashimasu. / Reply Romaji: Kochira koso, yoroshiku onegai itashimasu.
Reply
こちらこそ、よろしくお願いいたします。
こちらこそ、よろしくおねがいいたします。
Likewise — I look forward to it.
Gesture & etiquette
Bow slightly as you say this at the start of a new month, especially to superiors. In some Japanese offices, the first day of the month includes a brief all-hands morning greeting — this phrase is ideal for that context.
Monthly workplace greetings reinforce ongoing relationships and signal that you are aware of time passing in the shared work context. The addition of 「今月も」(this month too) implies continuity — you are not starting fresh, but extending an already-valued relationship.