‘Konami Code’ Creator Kazuhisa Hashimoto Dies At 61 https://kotaku.com/konami-code-creator-kazuhisa-hashimoto-dies-at-61-1841935132 Konami Code creator Kazuhisa Hashimoto dies at 61 - Polygon https://www.polygon.com/2020/2/26/21154655/konami-code-creator-dies-kazuhisa-hashimoto-obituary-contra-gradius-nes Veteran developer and Konami Code creator Kazuhisa Hashimoto has died • Eurogamer.net https://www.eurogamer.net/articles/2020-02-26-konami-code-creator-kazuhisa-hashimoto-has-died