もうす
godan verb
to say; to be called (humble)
1. to say (humble)
Humble form of 言う, used when referring to one's own speech.
(なん)(もう)しましょうか。
What should I say?
(もう)(わけ)ございませんが、もう一度(いちど)名前(なまえ)をお()かせいただけますか。
I'm terribly sorry, but could you tell me your name once more?
(もう)(わけ)ない = I'm sorry (lit. there's no excuse)
(さき)ほど担当(たんとう)(もの)(もう)しました(とお)り、来週(らいしゅう)までにご連絡(れんらく)いたします。
As our representative mentioned earlier, we will contact you by next week.
Using (もう)す for in-group members when speaking to outsiders
2. to be called (humble)
Used when introducing oneself humbly.
田中(たなか)(もう)します。
My name is Tanaka.
Humble self-introduction
ABC商事(しょうじ)鈴木(すずき)(もう)しますが、山田(やまだ)(さま)はいらっしゃいますか。
My name is Suzuki from ABC Trading — is Mr. Yamada available?
Business phone introduction
(はじ)めまして、本日(ほんじつ)司会(しかい)(つと)めます佐藤(さとう)(もう)します。どうぞよろしくお(ねが)いいたします。
Nice to meet you. My name is Sato, and I will be serving as today's host. Pleased to meet you.

申す is the humble form of 言う, used to lower oneself when speaking.

CONJUGATION:

  • 申します (polite)
  • 申して (te-form)
  • 申した (past)

COMMON EXPRESSIONS:

  • 〜と申します: my name is...
  • 申し訳ない: I'm sorry (lit. there's no excuse)

KEIGO TYPE:

  • 謙譲語(けんじょうご): Humble language
  • Honorific equivalent: おっしゃる