I spent two days in Jugong with my mother.
Location is excellent, just a 3-4 minutes walk needed from guesthouse to Eef beach.
The room looked a bit old, but clean and comfortable. Washing machine was provided for guests to do laundry.
More importantly, staffs there were extremely helpful and patient! My Japanese was not fluent, they still try their best to make me understand. They helped me book Hate no Hama tour and called a taxi whenever I want.
The only problem is, if you can't drive, like me, you may have to spend extra to call a taxi to the guest house since there's only about 6 buses a day in Kumejima
I recommend Jugong if you're planning a trip to Kumejima.
The room was clean, the bed was comfortable, and the location was perfect! English is very limited, but a translator app on both sides worked great! The bathrooms are traditional Japanese style of one big shower containing the toilet and sink, which we didn't mind at all. The location was perfectly placed between all our favorite sites!
I also recommend the breakfast! For 600¥ you get a large bento plate with meat, eggs, miso, salad, side, and as much rice as you'd like. Unlimited water, tea, and coffee was available around the clock, and a vending machine provided soda, juice, and beer. We ate at the Cyprese Resort on the last morning and left hungry after spending 2000¥ each.
Stop by M's Cafe around the corner for amazing iced coffee, soba, and yakitori! She has the best and most affordable in that area! Don't pass up the Bade Haus (bath house)! Get the basic entry and enjoy the pool/hot tub/sauna! (Kid friendly)