According to Official Guinness Records,
Kaneyuki Yamaguchi (Japan, b. 23 July 1945) has been working as computer software developer since 30 March 1964.
On the date of the record achievement, Kaneyuki Yamaguchi's career spanned 46 years 2 months 19 days.
He worked for ITOCHU Corporation from 30 March 1964 to 31 March 1998. On 13 January 1999 he founded his own software development company, IS22 Corporation, and has continued in the role of Director ever since.
For a complete list of 2010 records, please visit 2010 Guinness Records in Japan.