The 10c stamp is from 1974 UPU Centenary issue showing Hokusai's painting "Five Feminine Virtues".
Katsushika Hokusai (葛飾北斎, 1760–1849) was a Japanese artist, ukiyo-e painter and printmaker of the Edo period. In his time, he was Japan's leading expert on Chinese painting.Born in Edo (now Tokyo), Hokusai is best-known as author of the woodblock print series Thirty-six Views of Mount Fuji (富嶽三十六景, Fugaku Sanjūroku-kei, c. 1831) which includes the iconic and internationally recognized print, The Great Wave off Kanagawa, created during the 1820s.
The other two 44c stamps are from Abstract Expressionists issued in Mar.2010 featuring Joan Mitchell and Mark Rothko.
Joan Mitchell (1925-1992) created expansive paintings with an energetic style distinguished by large gestural strokes, driving brushwork, and emotional intensity. She is perhaps best known for her ability to communicate the visual sentiments of nature — or, in her own words, “to convey the feeling of the dying sunflower.” La Grande Vallée 0 (1983) is one of 21 opulent French landscapes.
Mark Rothko (1903-1970) is best known for his monumental paintings of two or more rectangles floated within a field of color. Orange and Yellow (1956) features two rectangles painted in the vibrant tones that Rothko favored. Far from static, the rectangles seem to stretch and contract, while translucent, luminous colors bring them to life.