Kazuhisa Hashimoto, the man who created one of the most famous Nintendo codes for Konami games passed away February 26, 2020. In a tweet from Konami:
We are saddened to hear about the passing of Kazuhisa Hashimoto, a deeply talented producer who first introduced the world to the “Konami Code”.
Our thoughts are with Hashimoto-san’s family and friends at this time. Rest In Peace.