Panasonic DVD-RAM (type 2, 4 or non-cartridge style) new 3x speed write
http://panasonic.jp/p3/multi/3x4xdisc.html

DVD-RAM discs in Yodobachi
http://www.yodobashi.com/enjoy/sear...long&sort=score

Maxwell DVD-RAM for data type 2 write speed 2x to 3x
http://www.yodobashi.com/enjoy/more/i/11697867.html