Hasegawa Tōhaku (長谷川 等伯, 1539 – March 19, 1610) was a Japanese painter and founder of the Hasegawa school. He is considered one of the great painters of the Azuchi–Momoyama period (1573-1603), and he is best known for his byōbu folding screens, such as Pine Trees and Pine Tree and Flowering Plants (both registered National Treasures), or the paintings in walls and sliding doors at Chishaku-in, attributed to him and his son (also National Treasures).