File:Inside Koto Laboratory 1999.jpg

Inside Koto Laboratory in 1999, the year that the original WonderSwan handheld game system was launched. Former Nintendo engineer Gunpei Yokoi (横井 軍平) had founded the company in 1996.

Source

 * The WonderSwan magazine vol. 1, Soft Bank. 1999.
 * Gunpei Yokoi's final two games by Erik Voskuil, Before Mario. 2014-04-21.