You can also look at flying to Akita and back. I recall that being cheaper than flying to Nagoya and more FOP's, but if you only need 21 fly on points, pretty much anything will get you over that hump because it's 2x mileage + 400 bonus points. There's such a huge service difference between Sapphire and Emerald if you fly a lot, that I'd eat the cost of the tickets to keep the status.