Mr. Ogawa and Mr. Maki are both my friends.
Ogawa-san mo Maki-san mo watashi no tomodachi da/desu.
In Japanese, the particle mo can follow two different nouns in a sentence which indicates that the two nouns fall in similar categories. The phrase which forms the phrase with use of mo is the subject of an affirmative sentence, which means "both...and," or as the subject or of a negative sentence, which means "neither...nor."
(1) This room and that room are both conference rooms.
Kono heya mo sono heya mo kaigishitsu desu.
(2) Both he and she are graduates of Harvard.
Kare mo kanojo mo hābādo no sotsugyōsei desu.
(3) Neither Jim nor Sam is a football player.
Jimu mo Samu mo futtobōru no senshu ja nai.
(4) My younger sister is neither a pianist nor a singer.
Imōto wa pianisuto demo kashu demo arimasen.
Hope this was helpful, and see you next time!
°˖ ✧◝(○ ヮ ○)◜✧˖ ° こゆうきあいはら °˖ ✧◝(○ ヮ ○)◜✧˖ °