a place name, such as that of Oita Prefecture or Oita City

a lot / a majority

a surname

(politics, historical, archaic) the head of the 太政官 (Ōimatsurigoto no Tsukasa, “Great Council of State”, the highest government office under the 律令 (Ritsuryō) system), equivalent to a “grand minister” or “chancellor of the realm”

optimization

to optimize

optimal solution

to cover from above

hurried; in a hurry

being in a hurry