KDDI
Penck

The Penck is considered to be the first "pebble shaped" mobile phone. It was launched two years before the Motorola PEBL by Japanese network operator KDDI. It was manufactured by Casio Hitachi Mobile Communications. It was designed by Makoto Saitō and was available in three colors, metal, milk (white), and bitter (black). The phone was only ever available in Japan.