Who designed/created DDR?

I've only ever seen Dance Dance Revolution (DDR) credited to "Konami." Does anyone know which invdividuals were responsible for designing/directing the game?

See: https://remywiki.com/DanceDanceRevolution_credits

While the English wikipedia page doesn't seem to list credits for the game, pages in other languages may (example: Spanish Wiki Page ). While I can't seem to confirm the full list as a single list elsewhere, RemyWiki does match to the wikipedia list on the elements where they overlap (thus supporting its accuracy), but offers a wider range of credits.

Cross-referencing the individual names does provide further sources confirming their involvement with the projects (example: DDR designer Kanako Yonezawa on MobyGames), in the same roles listed by the remywiki page (though it should be noted that the secondary sources I found did not necessarily confirm association with the first game itself), so the list does seem to be correct.

In regards to answering the specific question you presented, Yoshihiko Ota was the producer in charge of the project, Katsunori Okita and Kazuya Takahashi were the directors, and the following were designers on the project: Nobuo Tomita, Eiichi Yoshioka, Yukiko Mizoo, Yutaka Sakaue, Mitsuo Nagamoto, Tomohiro Ota, Kazushi Hasegawa, Takashi Inubushi, Akira Iizumi, Yoshiko Oiwa, Kanako Yonezawa.

If you're looking for general development background, The Ringer has a decent article on how the first DDR came about.