奥田

The ta changes to da as an instance of rendaku (連(れん)濁(だく)).

This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.

• (Tokyo) おくだ [òkúdáꜜ] (Odaka – [3])
• IPA^(key): [o̞kɯ̟da̠]

奥(おく)田(だ) • (Okuda) 

1. Okuda (neighborhoods in Japan):
   1. The neighborhoods of Inazawa and Nishio and of Mihama, Aichi Prefecture
   2. a neighborhood of Chikusei, Ibaraki Prefecture
   3. a neighborhood of Okayama, Okayama Prefecture
   4. a neighborhood of Higashiagatsumama, Gunma Prefecture
   5. a neighborhood of Hatoyama, Saitama Prefecture
   6. a neighborhood of Toyama, Toyama Prefecture
   7. a neighborhood of Yamatotakada, Nara Prefecture
   8. a neighborhood of Moji, Kitakyūshū, Fukuoka Prefecture
   9. a neighborhood of Ōhira, Miyagi Prefecture
2. a surname

   奥(おく)田(だ)邦(くに)雄(お)

   Okuda Kunio

   Kunio Okuda, hepatologist known for the Okuda needle (Chiba needle)