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Iwasaki Electronics Co., Ltd. (岩崎技研工業株式会社; Iwasaki Giken Kogyo Co., Ltd.; formerly Iwasaki Engineering Co., Ltd. in English) was a Kyoto-based company known primarily for making software development tools such as in-circuit emulators. Hiroji Iwasaki was the president. [1] It may have shut down around 2000. [2]

Iwasaki was contracted by Nintendo to reverse engineer the arcade game Donkey Kong so the latter could produce the sequel Donkey Kong Junior. [3] Nintendo did not have the source code as that was written by another company (Ikegami Tsushinki). Iwasaki would go on to program several of Nintendo's early Famicom/NES games. Members of Iwasaki left and started a new company in 1986 called Intelligent Systems [4], which continues to develop games and tools and has maintained a close relationship with Nintendo for its entire existence.

Iwasaki was once the parent company of HAL Laboratory. [5] [6]

Research Methods: Hidden data, online resources


  • Donkey Kong Jr. / Donkey Kong Junior (programming) (Nintendo) [7] [8]
  • Space Stranger (Yachiyo)
The company's name is written (in Japanese) on the schematics. [9] [10]
  • Vs. Soccer (Nintendo)


  • Devil World (programming)
  • Donkey Kong 3 (programming?)
  • Duck Hunt (programming?)
  • Hogan's Alley (programming?)
  • Mario Bros. (programming?)
  • Robot Block / Stack-Up (programming?)
  • Robot Gyro / Gyromite (programming?)
  • Soccer
  • Tennis (programming?)
  • Wild Gunman (programming?)
  • Wrecking Crew (programming?)

Famicom Disk System

  • Metroid (programming)
  • PALPS (unreleased) (Lomas) [11] [12] [13] [14] [15]
  • Soccer
  • Tennis (programming?)