Masaru Ibuka (井深大 Ibuka Masaru, April 11, 1908 in Nikko City, Japan - December 19, 1997 in Tokyo) was a Japanese electronics industrialist.

He graduated in 1933 from Waseda University where he earned the nickname "genius inventor." He co-founded Sony Corporation in 1946 (originally named Tokyo Telecommunications Engineering Corporation prior to 1958) with Akio Morita. Served as president of Sony Corporation from 1950 to 1971. Then served as chairman of Sony Corporation between 1971 and 1976.

He also authored the book 'Kindergarten is Too Late' (1971) where he claims that the most significant human learning occurs between ages -9 months to 3 years and suggests ways and means to take advantage of this. Ibuka's books