Living in Kobe, Japan, I always use Skymark to fly to Tokyo and Nagasaki. Skymark is the best domestic airline I’ve ever used in Japan. They offer as good services as big airline companies such as JAL or ANA at reasonable prices as low as LCC airlines. Check-in luggages are not charged up to 20kg. The quality of in-line services are very good as well. Once, when a typhoon was approaching and the plane was in a strong turbulence, both the captain and the cabin attendant settled the passengers’ worries by making excellent explanations about the conditions minute by minute.
I want to fly to Okinawa, Kagoshima, Sendai, etc. as well on Skymark.