Formal to Client
Workplace · Email
誠に恐れ入りますが、今回はお受けすることが難しい状況でございます。 — I am truly sorry, but I'm afraid it is difficult to accept this on this occasion. (Workplace · Email, Formal to Client, JLPT N3)
You
誠に恐れ入りますが、今回はお受けすることが難しい状況でございます。
まことにおそれいりますが、こんかいはおうけすることがむずかしいじょうきょうでございます。
I am truly sorry, but I'm afraid it is difficult to accept this on this occasion.
Romaji: Makoto ni osoreirimasu ga, konkai wa o-uke suru koto ga muzukashii joukyou de gozaimasu. / Reply Romaji: Sou desu ka. Zannen desu ga, shikataganai desu ne.
Reply
そうですか。残念ですが、仕方がないですね。
そうですか。ざんねんですが、しかたがないですね。
I see. That's a shame, but it can't be helped.
Gesture & etiquette
Email context — no gesture. If this refusal is for a significant partnership or proposal, follow up with a phone call to personally apologize and explain. Email-only refusals can feel cold for important relationships in Japan.
Japanese business refusals rarely say 'no' directly — instead, they explain 'the situation makes it difficult.' 「今回は」(on this occasion) implies future possibilities remain open, softening the rejection. Always precede the refusal with the double apology opener 「誠に恐れ入りますが」for client-level formality.