ADK (company)

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Former type Private
Industry Computer and video game industry
Fate Closed, properties sold
Founded July 1980
Defunct 2003
Headquarters Saitama, Japan
Products Arcade games
Video games

ADK Corporation (Japanese: 株式会社エーディーケイ Hepburn: Kabushiki Kaisha ADK?), formerly known as Alpha Denshi Corporation (株式会社アルファ電子?), was a Japanese video game production company founded in July 1980. "ADK" is an acronym for Alpha, Denshi, and the Japanese term for "corporation", Kabushiki kaisha. The company began as a developer of arcade games but is best known for their library of SNK Neo Geo titles, mainly produced in the 1990s in partnership with SNK. Most notable among these are their fighting games, especially the World Heroes series. The company declared bankruptcy in 2000 with properties sold to SNK Playmore in 2003.



When ADK was founded in July 1980 in Saitama, Japan,[citation needed], it was known as Alpha Denshi Kabushiki kaisha, or sometimes known as Alpha Denshi or simply Alpha. The first two arcade video games they created were Janputer (ジャンピュータ?), the world's first mechanical arcade Mahjong game that was released in May 1981 by Sanritsu Giken Corp; and Shougi (将棋?), a basic, but well-developed Japanese chess game that was released a year later by Tehkan. Afterwards, Sega and Tecmo would sell Alpha Denshi-produced games through the early 1980s. In the later 1980s, Alpha Denshi became a partner of SNK. Around 1993, Alpha Denshi Kabushiki kaisha abbreviated its name to ADK.

ADK made games for many genres, including maze games like Crush Roller, sports like Champion Baseball, shooters like Time Soldiers, platformers like Magician Lord, Blue's Journey, role-playing games like STED: Iseki Wakusei no Yabou, fighting games like the World Heroes series, and beat 'em up games like Gang Wars and Ninja Combat. The company became quite famous, with considerable success in North America.

In early 1990s, ADK started developing many games for SNK's Neo Geo system. However, through the mid to late 1990s, ADK failed to win very much success, especially during the eras of the Neo Geo Pocket and Neo Geo Pocket Color handheld systems, which were also failing at the time. The company eventually went bankrupt and closed its installations in early 2000 (SNK itself would declare bankruptcy the very next year). SNK's successor SNK Playmore ended up buying ADK's intellectual properties.


Today, ADK has a legacy in the hands of SNK Playmore, with new appearances of its characters, notably in the fighting game Neo Geo Battle Coliseum, where Hanzo, Fuuma, Mudman and Neo Dio from the World Heroes series appeared, as well as Kisarah Westfield and Joe Kusanagi (in a cameo in one of Kisarah's attacks) from Aggressors of Dark Kombat.

Some originally ADK characters have made an appearance in the Nintendo DS version of SNK vs. Capcom: Card Fighters Clash, such as Hanzou and Fuuma from the World Heroes franchise and Sasuke from Ninja Master's. Their characters appear in this game as SNK character cards and as Action and Counter cards.

List of products[edit]

Early arcade games[edit]

Although, some were ported to other platforms, they all started on this platform.


Note: KAC was a company known for co-supporting SNK in the NES market.


Although, some were ported to other platforms, they all started on this platform.

Neo-Geo CD[edit]

Hyper Neo-Geo 64[edit]


Note: MiraiSoft was actually a concealment label of ADK.

Neo-Geo Pocket[edit]

Neo-Geo Pocket Color[edit]

External links[edit]