JAL to expand domestic first class service

Japan Airlines (JAL) announced they will expand the domestic first class service to Tokyo Haneda (HND) - Okinawa Naha (OKA) route from August 1 2012 and plans to add more flights with domestic first class service on flights to Fukuoka (FUK) and Sapporo Chitose (CTS)
Currently JAL is using their 3-class configured 777s with domestic first class seats on some of the flights between HND and OKA. There flights are only sold as a 2-class ones and certain passengers such as JAL Mileage Bank (JMB) frequent flyers can select the seats in the first class cabin for free although service would still be Class J one. Since most likely the only incremental cost to provide F service would be catering, it seems to make sense to roll out domestic F to this route as well. Not to mention this is one of the longest scheduled domestic routes in JAL network.