2500yen/person, you can eat oyster with BBQ style within 60mins as much as you want
from 7th Jan 2017 to end of May, closed every Wednesday(the end of season is depends on oyster which is nature stuff so can be the place close earlier than end of May)
Address: 518-1 Kamai, Kumihama-cho, Kyotango(京丹後市久美浜町蒲井 518-1)
Take a city bus, Minato line(Himawari-go), from Kumihama station leaves at 12:22 and arrive at Kamai 12:57 and about 5mins walk. Bus fare: 200yen/person(please pay exact amount). The bus doesn't run on weekends&public holidays&31st Dec, 1st-3rd Jan. Unfortunately, there is no bus running to go back to Kumihama station from Kamai.
**BUT there is a shared taxi running in Kumihama town. It costs 500JPY/person per ride within Kumihama town area. Since it is a shared taxi, you need to make a reservation.
Reservation phone number:0772-42-0390 (operation hour: 7:30-18:30)
Better to ask someone who can speak Japanese to book, for example tourist information centre at Kumihama station open 9:00-17:00. The shared taxi's operation hour is 8:30-17:30.
（電話受付時間 ： ７：３０ ～ １８