K2 Black Panther (Hangul: K2 '흑표', hanja: K2 '黒豹') is an advanced main battle tank which will replace the M48A5K Patton tanks and complement the K1 series of main battle tanks currently fielded by the Republic of Korea. Full-scale mass-production is currently under way. The K2 is expensive battle tank, currently costing approximately ₩8.3 billion South Korean won, or around US$8.5 million, per unit, overtaking the Japanese Type 90, which costs approximately US$7.4 million as of 2008