Yo Takenaka (竹丠覠Takenaka Yà Â, 1903âÂÂ1966) was a Japanese plant geneticist and a professor of Department of Cell Genetics, National Institute of Genetics. He is notable for researching the phylogenetic classification of cherry blossom. He discovered that Prunus àyedoensis is a crossbreed of two wild species of Japanese cherry; Prunus spachiana forma ascendens (Edo higan) and Prunus speciosa (Oshima zakura) by crossing experiments. He was also known as a researcher on Japanese morning glory and Nicotiana.
He was born in Hyà Âgo Prefecture, Japan in 1903. He graduated from the Department of Botany, Faculty of Science, Tokyo Imperial University in 1927. He was a professor of Keijà  Imperial University from 1929 to 1945. After the end of war, he became a professor of National Institute of Genetics in 1949. He died on 18 March 1966 at the age of 62.