Oita Airport sits on the Kunisaki Peninsula, about an hour from Beppu by airport bus. Many travellers instead drive or take a highway bus from Fukuoka in a little over two hours as part of a wider Kyushu trip.
In Oita the hotel is part of the destination. Beppu Golf Club is an early layout from around 1930, while the Kuju highlands sit high enough that a round there feels quite different from one on the coast.
Beppu and Yufuin are busiest in autumn and winter, so it is safer to book the hotel first. The Kuju highlands are a good summer escape but run cold in winter, with foggy mornings.
Comparing a Japanese tee time on the headline green fee alone tends to produce a different number at the counter. Confirm whether cart, caddie or self play, lunch, locker and the local golf tax are included, then check rental clubs or shoes, minimum player counts, two-player supplements, payment method and whether overseas visitors can book. Clubs may also specify check-in times, dress codes and bathing etiquette, so submit player names accurately.
Fix two nights at a Beppu or Yufuin onsen, play eighteen around Beppu on day two, then add a round in the Kuju highlands or central Oita. Ryokan serve dinner at a set time, so work out your finish time first.