http://www.ar.jal.com/region/en/abou...ss/081009.html

Offering 20% more legroom than economy class, the JAL Sky Shell Seat offers a 120 degree angle of recline, an 18.9-inch (48cm) seat width, and a 38-inch (97cm) seat pitch. The hard shell design, inspired by the carriers award-winning JAL Shell Flat Seat in business class, features a sliding seatback that ensures that every passengers private space is maintained throughout the flight, undisturbed even when the seat in front is reclined.