Kazuhiko "Kay" Nishi (西 和彦 Nishi Kazuhiko, born February 10, 1956 in Kobe, Japan) is a Japanese businessman and personal computer pioneer.
Nishi's father ran a private school. Nishi attended Waseda University but dropped out to help found the first Japanese computer magazine, I/O. Shortly thereafter he launched ASCII magazine (a Japanese equivalent of Byte or Creative Computing) and, in 1978, ASCII Corporation, which began by making a rough translation from English to Japanese of the game Wizardry. Around the same time he met and became friends with Microsoft founder Bill Gates.
In Japan, Nishi worked with NEC on developing the PC-8001, an early consumer-ready personal computer not requiring assembly, which became a standard in Japan, and was involved in the design of the Kyotronic 85 which, sold to Radio Shack, became the TRS-80 Model 100, an early laptop computer.
Nishi's relationship with Bill Gates helped ASCII Corporation to grow. MSX, a new personal computer format, was jointly developed by Microsoft and ASCII Corporation for the Japanese market. But Nishi and Gates fell out, the partnership was dissolved in 1986, and Microsoft set up its own Japanese software subsidiary. But ASCII Corporation continued to thrive.
Under Nishi's direction, ASCII Corporation invested heavily in American startups in the electronics industry. By 1992 ASCII Corporation was heavily in debt and its stock price collapsed. At the direction of the Ministry of International Trade and Industry, the Industrial Bank of Japan and other banks bailed out the company, which rebounded.