Shigehiro Kasamatsu is a Japanese video game Programmer who worked for SRD (Systems Research & Development) in the late 1980’s through the 2010’s. SRD is a software programming company that was established in 1979 and is headed by Toshihiko Nakago. SRD is a Nintendo partner that programs various Nintendo developed titles. SRD has no capital relationship with Nintendo however has very strong ties to Nintendo, so much so that the company’s games division is actually located within Nintendo’s main office in Kyoto.

SRD has provided programming support for nearly every Nintendo EAD developed title since the mid 1980’s. Kasamatsu joined the company in 1987 and was involved with the creation of Yume Kōjō: Doki Doki Panic, Super Mario Bros. 3, Super Mario World and Super Mario All-Stars.