Hiromichi Yamagata ( 1948 - ) is a Japanese Pop Art painter, known for his use of vivid colors in his works. Hiromichi Yamagata s works have been put up for auction numerous times, with realized prices greatly surpassing estimated prices, varying from 850 USD for Four Cities Suite in 2004 to a remarkable record 6432.29 USD for Perrier in 2010 , based on the size and medium of the artwork.