Ryohei Koiso ( 1903 - 1988 ) was a Japanese painter. Ryohei Koiso s works have been put up for auction numerous times, with realized prices greatly surpassing estimated prices, varying from 312.85 USD for Still life and children in 2009 to a remarkable record 1552.62 USD for 3 ladies in 2010 , based on the size and medium of the artwork.