Yasuko Yamada (better known as Yasko Yamada) is a Japanese composer and sound designer. While attending college, she played keyboards in a band. Around 1988, she started working for Taito and became a part of their in-house sound team Zuntata. Her first game there was New Zealand Story. She usually worked with Norihiro Furukawa, who she was also classmates with. She is best known for gems such as Bubble Symphony and Don Doko Don. She also worked on the manual to the OTIS sound system by Ensoniq, which was used in many Taito arcade titles.
Around 1996, Yasuko left Taito to start her own sound group, Reeb, with Dota Ando. Regarding her work with Reeb, she is best known for her involvement with the Choro Q series, but also continues to work with Taito.
Game Boy Color
Someone at Reeb with the surname Matsushita created the sound engine and Yamada wrote it in Music Macro Language.
Though George Tokoro is credited for composing the music to Jagainu-kun, Yamada explained that she composed most of the music, and for the music by Tokoro, she received videotapes of him performing it and transcribed it by ear.
Yasuko used a sequencer.
Yasuko used a sequencer programmed by someone named Omake KZM.