Takeo Yamaguchi (山口長男, Yamaguchi Takeo, born November 23, 1902, in Seoul, Korea, died April 23, 1983, in Tokyo, Japan) was an avant-garde Japanese painter of monochrome Art Informel works.

Takeo Yamaguchi
山口長男
Takeo Yamaguchi in 1964
Born	(1902-11-23)November 23, 1902 Seoul, Korea
Died	April 23, 1983(1983-04-23) (aged 80) Tokyo, Japan
Nationality	Japanese
Known for	Painting
Movement	Avant-garde, Monochrome Art Informel

Yamaguchi studied Western painting at the Tokyo Art School. Upon graduation in 1927, he moved to Paris to study European painting. He developed his mature style during the mid-1950s, with a focus on flatness.^[1]

Yamaguchi's Yellow Eyes, painted in 1959, sold for US$948,500 at Sotheby's Contemporary Art Evening Sale in New York on May 18, 2017,^[2] which set a record for the highest price paid for the artist's work.^{[citation needed]}

• 1955 - São Paulo Biennial^[1]
• 1956 - Venice Biennale: Japan Pavilion
• 1958 - Guggenheim Museum: Guggenheim International Award exhibition,
• 1963 - São Paulo Biennial
• 1964 - Museum of Modern Art, New York: The New Japanese Painting and Sculpture

• 1961 - Minami Gallery, Tokyo^[1]
• 1963 - Nihonbashi Gallery, New York
• 1965 - Minami Gallery, Tokyo
• 1968 - Minami Gallery, Tokyo
• 1972 - Minami Gallery, Tokyo
• 1975 - Minami Gallery, Tokyo

• Guggenheim Museum, New York^[3]
• Metropolitan Museum of Modern Art, New York
• Brooklyn Museum, New York
• Menard Art Museum, Nagoya
• Shizuoka Prefectural Museum of Art
• Shimane Art Museum
• Museu de Arte Moderna, São Paulo
• National Museum of Modern Art, Tokyo
• Municipal Museum, Kagoshima
• Museum of Modern Art, Kamakura