Some video game developers become historical figures through interviews, photographs, convention appearances, and decades of public discussion about their work. Atsushi Okazaki is almost the opposite. His career has to be reconstructed from staff rolls, Japanese credit transcriptions, manuals, old company connections, and a handful of names that appear at the end of games released across several generations of hardware.
Those fragments reveal considerably more than might first appear. Okazaki, whose name is written 岡崎厚詞, can be securely traced from the late Famicom era into the Dreamcast years. His documented credits include directing, game planning, programming, producing, staff work, and special thanks. He directed Abadox in 1989, remained connected to developers around Natsume, worked in hands-on planning and programming roles during the Super Famicom era, and by the late 1990s had become a producer associated with Bottom Up. One Dreamcast game even preserves an unexpected nickname, “Fighter Okazaki.”
The surviving record is incomplete, but it is enough to trace a career that moved through several different layers of Japanese game development during one of the industry’s most important periods.
Directing Abadox
The strongest starting point for Atsushi Okazaki’s known career is Abadox, the strange and memorable shooter released for the Famicom in Japan on December 15, 1989.
The game places the player inside a gigantic alien organism that has swallowed an entire planet. Instead of the clean mechanical environments associated with many science fiction shooters of the period, Abadox sends its hero through fleshy passages, internal organs, grotesque creatures, and other biological horrors. Stages alternate between horizontal and vertical scrolling as the player travels deeper into the monster.
Behind that unusual premise was a small credited development team.
The original staff roll names A. Okazaki as director. Takashi Nagai and Tadashi Makimura are credited as producers, Hidenobu Takahashi as character designer, Kiyohiro Sada as sound creator, and Kimiya Sasaki, Seiichi Tajima, and Kōichi Dekune as programmers. Natsume is named as the presenter. Modern archival sources that reproduce the original credits consistently expand A. Okazaki to Atsushi Okazaki.
That credit matters because director is not a peripheral acknowledgment. Even though surviving documents do not tell us exactly how authority was divided among the people and companies involved, Okazaki was credited with overseeing the game rather than simply contributing to one isolated technical department.
The development history is more complicated than the Natsume name alone suggests. Archival databases associate Abadox with Natsume, ITL, and Dynamic Planning, while the staff credits bring together people who later appear across several related companies and projects. The safest conclusion is that Okazaki was already deeply involved in the Natsume development circle by 1989, without assuming that every person in the credits necessarily held a conventional full-time position at the same corporate office.
For Okazaki, Abadox is especially important because it gives us something rare in the career of an obscure developer: a clearly identified leadership role at the very beginning of the surviving record.
The Natsume Circle Continues with Final Mission
A year later, Okazaki’s name appeared again.
Natsume released Final Mission for the Famicom in 1990. Western players would eventually know versions of the game as S.C.A.T.: Special Cybernetic Attack Team in North America and Action in New York in Europe. Like Abadox, it was a scrolling shooter, although it used flying human characters rather than sending a lone soldier through the anatomy of a living planet.
Okazaki was not credited as its director. Instead, the Japanese staff roll includes “Atusi Okazaki” in Special Thanks. He appears alongside another name that becomes increasingly significant when reconstructing the later part of his career: Shigeru Okamoto, better known in some credits as Rocky Okamoto.
Several other Abadox associates also remain visible around the project. Kiyohiro Sada handled sound design, while Satoshi Yoshikawa, who had been thanked in Abadox, became producer and programmer on Final Mission.
A Special Thanks credit does not reveal exactly what Okazaki contributed. It would be speculative to assign him design, programming, supervision, or any other specific responsibility. What it does demonstrate is continuity. He had not simply directed one isolated Natsume-associated game and disappeared. He remained connected to the same development network as it moved into another major Famicom production.
That network would matter again several years later.
From Direction to Game Planning
By 1995, Okazaki’s surviving credits show a different side of his work.
Kōryū no Mimi, released for the Super Famicom, was based on the work of novelist Arimasa Osawa and manga artist Noriyoshi Inoue. Its credits identify Okazaki by his full Japanese name, 岡崎厚詞, under Game Planning.
That Japanese spelling is historically useful. Earlier credits such as Abadox relied on an initial and romanized surname, making identification harder for researchers tracing developers across unrelated games. Kōryū no Mimi ties the full name Atsushi Okazaki directly to 岡崎厚詞 and provides a stronger foundation for connecting his later Japanese-language credits.
The role itself is equally interesting.
Japanese game planners could perform work that crossed the boundaries of design, documentation, progression, mechanics, balancing, scenario organization, and communication between different parts of a development team. The title does not allow every individual design decision in Kōryū no Mimi to be assigned personally to Okazaki, but it establishes that his work extended well beyond the directorial credit preserved in Abadox.
Another game from the same year provides even stronger evidence that he understood development at a technical level.
Programming Spark World
The 1995 Super Famicom game Spark World credits Atsushi Okazaki as one of its programmers, alongside Satoshi Yoshikawa and Kou Ohira. Shigeru Okamoto appears as supervisor, while Kiyohiro Sada again surfaces in the sound staff.
The names are becoming familiar.
Okazaki, Yoshikawa, Sada, and Okamoto had connections reaching back to the Natsume projects of the Famicom period. Their reappearance around Spark World demonstrates how misleading it can be to study Japanese video game history entirely through company names. Development personnel moved between studios, worked with former colleagues, participated in contracted projects, and formed new companies while preserving professional relationships built years earlier.
Okazaki’s programming credit is also revealing on its own.
A developer who can be documented as a director in 1989, a game planner in 1995, and a programmer in another 1995 production does not fit neatly into a single job description. The surviving credits instead suggest the kind of versatile career common among smaller Japanese development teams, where individuals could move between technical, organizational, and creative responsibilities depending on the project.
By the end of the decade, however, Okazaki’s credits begin pointing toward a more consistent role.
He became a producer.
The Rise of Bottom Up
The company most closely associated with the later part of Atsushi Okazaki’s known career was Bottom Up.
Game Developer Research Institute identifies Bottom Up as a company established by former Natsume employees and names Shigeru Okamoto as its president. That history makes Okazaki’s appearance there much less surprising. Okamoto and Okazaki had already appeared together in the credits of Final Mission, and Okamoto later supervised Spark World. Bottom Up therefore appears not as an entirely separate chapter, but as another stage in a professional network that stretched back into the Famicom years.
The company became active across PlayStation, Nintendo 64, Game Boy, Game Boy Color, WonderSwan, and Dreamcast software during the closing years of the 1990s. Its catalog was eclectic, ranging from card and board games to golf, sumo wrestling, billiards, snowboarding, and other projects.
By 1998, Atsushi Okazaki was being identified explicitly with Bottom Up.
Producing Doki Doki On Air
The PlayStation title Doki Doki On Air was released in Japan on June 11, 1998. Its Japanese credits provide unusually direct evidence about Okazaki’s position.
He is listed as producer under his full name, 岡崎 厚詞, with Bottom Up specifically identified beside his credit. Atsumi Okada of JCM is also credited as a producer, while Dream Japan is listed for planning and development.
This is one of the clearest surviving records from the later portion of his career because it does more than attach his name to a game. It directly associates him with Bottom Up while giving him a production role.
Producing required a different perspective from programming an individual portion of a game. Depending on the company and project, producers could oversee schedules, budgets, external relationships, staff coordination, publishing responsibilities, and the broader process needed to move a project from conception to a finished commercial product.
Okazaki had apparently moved from directing and hands-on development into that broader level of responsibility.
His next credits make that transition even clearer.
Producing for the Nintendo 64
On August 7, 1998, Bottom Up released 64 Trump Collection: Alice no Waku Waku Trump World for the Nintendo 64.
The Japanese staff roll names Rocky Okamoto as executive producer and Atsushi Okazaki as producer. Bottom Up is identified as the production company. The game therefore places the two developers who had been thanked together on Final Mission in 1990 near the top of a Nintendo 64 production almost eight years later.
That continuity is one of the most interesting threads running through Okazaki’s career.
A similar arrangement appears again in 64 Ōzumō 2, released on March 19, 1999. Rocky Okamoto is once more executive producer, while 岡崎 厚詞 is credited as producer. Beneath them appears a much larger team responsible for programming, graphics, system design, event work, and other parts of the finished game.
By this point, producer was no longer an isolated title attached to a single project. It had become the most visible pattern in Okazaki’s surviving late 1990s credits.
The programmer credited on Spark World had moved into a position overseeing Nintendo 64 projects.
“Fighter Okazaki” on the Dreamcast
The Dreamcast era provides one of the strangest details in Okazaki’s documented career.
Golf Shiyōyo, released internationally as Tee Off, contains a staff section naming Kaname Yamamoto, Tetsuya Hakata, Izumi Shinkai, and “Fighter Okazaki.” Modern credit records identify Fighter Okazaki as Atsushi Okazaki. The ending also identifies Bottom Up.
Japanese game credits of the 1980s and 1990s frequently used nicknames, abbreviated names, jokes, initials, and aliases. These practices could reflect company policies, office culture, privacy concerns, or simple playfulness among development teams. Decades later, they create serious challenges for historians attempting to reconstruct who actually made a game.
In Okazaki’s case, the identification of “Fighter Okazaki” adds another search term to the record and helps explain how a developer could appear to vanish even while remaining active.
Another Dreamcast project from 1999, Jet Coaster Dream, later released internationally as Coaster Works, gives Atsushi Okazaki a Special Thanks credit. Shigeru Okamoto is executive producer of the Japanese version, while Bimboosoft is identified as the developer.
Once again, Okazaki was operating within the same professional world that had surrounded him for years.
Then that world changed abruptly.
The End of Bottom Up
Bottom Up did not survive long into the new century.
Research assembled by GDRI states that the company filed for bankruptcy on March 31, 2000. Its development team and rights connected with Golf Shiyōyo were subsequently transferred to the Korean company Softmax, which established a Japanese subsidiary shortly afterward. GDRI cites contemporary Dreamcast Magazine reporting for that transition.
The bankruptcy provides an important historical explanation for why Okazaki’s well-supported Bottom Up credit trail ends around this period.
This does not prove that he left the video game industry, nor does it prove precisely where he went next. It simply marks the end of the strongest continuous sequence of surviving credits.
There are tantalizing clues about what followed, but they require much greater caution.
The Uncertain Parts of Okazaki’s Story
A few records may eventually extend Atsushi Okazaki’s career in both directions.
One GDRI credit transcription contains a possible earlier attribution from Touhou Kenbunroku, where a manager using the nickname “Kouchi no Nushi” is tentatively identified as Atsushi Okazaki. The researchers themselves place a question mark beside the identification. Without another source connecting that nickname directly to 岡崎厚詞, it should not be treated as a confirmed Okazaki credit.
A Bottom Up production called Sugoroku Ginga Senki includes a person thanked as “Atchan Ojisan,” another nickname tentatively associated with Okazaki by researchers. Again, the evidence is not strong enough to convert the possibility into fact.
There are also post-Bottom Up leads.
GDRI researchers have pointed toward an old 2003 Kochi University of Technology webpage that reportedly discussed Atsushi Okazaki in connection with educational software at Konami. The original page is no longer available at its former live address, meaning an archived copy would need to be recovered before using it confidently to establish his employment or job title. Another research trail suggests some connection with FarEast Brains, but the older Japanese pages cited as evidence are similarly difficult to verify today.
These leads are worth pursuing. They are not yet strong enough to become biography.
That distinction matters.
What the Surviving Credits Tell Us
Even without the uncertain material, the documented record tells a substantial story.
In 1989, Atsushi Okazaki directed Abadox. In 1990, he remained within the Natsume circle through a Special Thanks credit on Final Mission. By 1995, he was credited with game planning on Kōryū no Mimi and programming on Spark World. In 1998 and 1999, he emerged as a producer for Bottom Up on projects including Doki Doki On Air, 64 Trump Collection, and 64 Ōzumō 2. His appearance as Fighter Okazaki in Tee Off and his acknowledgment in Coaster Works carry his known development connections into the Dreamcast era.
That sequence is notable because the roles change so much.
Okazaki was not simply “the director of Abadox.” He was also a planner, programmer, producer, and staff member whose professional relationships crossed multiple hardware generations. The same names repeatedly appear around him, particularly Shigeru Okamoto, Satoshi Yoshikawa, and Kiyohiro Sada. What looks at first like a scattered collection of unrelated credits begins to resemble a network of developers who continued working together long after individual company names changed.
Why Atsushi Okazaki Matters
Video game history has a visibility problem.
The most famous designers are often remembered through interviews, books, documentaries, and public appearances. Thousands of other developers have been reduced to names displayed for a few seconds after the final boss. Sometimes even those names were disguised behind initials or nicknames.
Atsushi Okazaki is an excellent example of why those credits deserve to be preserved.
His career touches the Famicom, Super Famicom, PlayStation, Nintendo 64, and Dreamcast eras. He can be found directing a grotesque shooter in 1989, planning and programming games during the mid 1990s, and producing projects during the transition into three-dimensional console gaming at the end of the decade. His credits also illuminate a wider history stretching from Natsume-associated development teams to Bottom Up and the collection of programmers, designers, musicians, and producers who moved through those companies.
There is still much that cannot be said about him. No dependable public biography presently establishes his birth date, education, birthplace, the exact circumstances under which he entered game development, or what became of him after the collapse of Bottom Up. The possible Konami and FarEast Brains connections remain research leads rather than settled history.
Yet the absence of those details does not make his career unimportant.
It makes preservation more important.
Every surviving ending sequence, manual, archived webpage, development credit, and old Japanese magazine has the potential to restore another piece of a career that would otherwise disappear. In Okazaki’s case, enough pieces have survived to reveal a developer who moved repeatedly between creative, technical, and managerial responsibilities while remaining connected to one of the less documented networks behind Japanese console development.
For many players, Atsushi Okazaki may still be only the name behind “A. Okazaki” at the end of Abadox.
The credits show that his story was much larger than one game.
Sources & Further Reading
Natsume. Abadox. Famicom, 1989. Original game credits. Director credited as A. Okazaki, identified as Atsushi Okazaki. Transcribed by MobyGames. Accessed October 15, 2026. https://www.mobygames.com/game/11083/abadox-the-deadly-inner-war/credits/nes/
Arcade-History. “Abadox [Model NAT-A3].” Staff information derived from the original game ROM, including Atsushi Okazaki as director. Accessed October 15, 2026. https://www.arcade-history.com/game/53805/abadox-model-nat-a3
Game Developer Research Institute. “ITL (Credits).” Includes a transcription of the original Abadox staff roll identifying Atsushi Okazaki as director. Accessed October 15, 2026. https://gdri.smspower.org/wiki/index.php/ITL_%28credits%29
Natsume. Abadox: The Deadly Inner War. Nintendo Entertainment System instruction manual. Milton Bradley, 1990. Transcribed by World of Nintendo. Accessed October 15, 2026. https://www.world-of-nintendo.com/manuals/nes/abadox.shtml
REG-Vault. “Abadox: The Deadly Inner War.” Archival entry with original manual, box art, and screenshots. Accessed October 15, 2026. https://regvault.org/game/nes/abadox-the-deadly-inner-war
Natsume. Final Mission / S.C.A.T.: Special Cybernetic Attack Team. Famicom/Nintendo Entertainment System, 1990. Original game credits. Atsushi Okazaki credited under Special Thanks. Transcribed by MobyGames. Accessed October 15, 2026. https://www.mobygames.com/game/16526/scat-special-cybernetic-attack-team/credits/nes/
MobyGames. “S.C.A.T.: Special Cybernetic Attack Team.” Release, development, and staff information for Natsume’s 1990 shooter. Accessed October 15, 2026. https://www.mobygames.com/game/16526/scat-special-cybernetic-attack-team/
VAP. Kōryū no Mimi. Super Famicom, 1995. Original game credits. Game Planning credited to Atsushi Okazaki (岡崎厚詞). Transcribed by MobyGames. Accessed October 15, 2026. https://www.mobygames.com/game/141101/koryu-no-mimi/credits/snes/
RPGONE Translations. “Koryu No Mimi.” Reproduction and translation of the Japanese development credits, identifying Okazaki Atsushi (岡崎厚詞) in game design/planning. Accessed October 15, 2026. https://rpgone.superfamicom.org/koryu
Game Developer Research Institute. “Credits Repository Archive 01.” Includes credit transcriptions for Kōryū no Mimi, Spark World, and other Japanese titles associated with Atsushi Okazaki. Accessed October 15, 2026. https://gdri.smspower.org/wiki/index.php?redirect=no&title=Credits_Repository_Archive_01
VAP. Spark World. Super Famicom, 1995. Original game credits. Atsushi Okazaki credited as a programmer. Transcribed by MobyGames. Accessed October 15, 2026. https://www.mobygames.com/game/262771/spark-world/
Bottom Up. Doki Doki On Air. PlayStation, 1998. Japanese release credits. Atsushi Okazaki (岡崎 厚詞) credited as producer for Bottom Up. Transcribed by Raido. Accessed October 15, 2026. https://raido.moe/staff/ps1/ps1_doki_doki_on_air.html
Bottom Up. 64 Trump Collection: Alice no Waku Waku Trump World. Nintendo 64, 1998. Japanese release credits. Atsushi Okazaki (岡崎 厚詞) credited as producer. Transcribed by Raido. Accessed October 15, 2026. https://raido.moe/staff/n64/n64_64_trump_collection.html
MobyGames. “64 Trump Collection: Alice no Waku Waku Trump World.” Credits identifying Atsushi Okazaki as producer and Shigeru Okamoto as executive producer. Accessed October 15, 2026. https://www.mobygames.com/game/201202/64-trump-collection-alice-no-waku-waku-trump-world/
GameGear Archive. “64 Trump Collection: Alice no Wakuwaku Trump World.” Archival entry containing Japanese box art, promotional material, screenshots, cartridge data, and original manual. Accessed October 15, 2026. https://gamegear.net/archive/games/n64/64-trump-collection-alice-no-wakuwaku-trump-world-japan
Bottom Up. 64 Ōzumō 2. Nintendo 64, 1999. Japanese release credits. Atsushi Okazaki (岡崎 厚詞) credited as producer. Transcribed by Raido. Accessed October 15, 2026. https://raido.moe/staff/n64/n64_64_ozumo_2.html
MobyGames. “64 Ōzumō 2: Nintendo 64 Credits.” Atsushi Okazaki credited as producer and Rocky Okamoto as executive producer. Accessed October 15, 2026. https://www.mobygames.com/game/201230/64-ozumo-2/credits/n64/
Bottom Up. 64 Ōzumō 2. Nintendo 64 Japanese instruction manual. 1999. Archival scan preserved by Emulation64. Accessed October 15, 2026. https://www.emulation64.fr/pdf/N64%20-%2064%20Oozumou%202%20%28Japonais%29.pdf
Bottom Up. Golf Shiyōyo / Tee Off. Dreamcast, 1999. Original credits. Atsushi Okazaki credited under the alias “Fighter Okazaki.” Transcribed by MobyGames. Accessed October 15, 2026. https://www.mobygames.com/game/9194/tee-off/credits/dreamcast/
REG-Vault. “Tee Off.” Archival entry containing the Dreamcast manual, box art, and screenshots for the Bottom Up-developed game. Accessed October 15, 2026. https://regvault.org/game/dreamcast/tee-off
Bimboosoft. Jet Coaster Dream / Coaster Works. Dreamcast, 1999. Japanese release credits. Atsushi Okazaki credited under Special Thanks and Shigeru Okamoto as executive producer. Transcribed by MobyGames. Accessed October 15, 2026. https://www.mobygames.com/game/45632/coaster-works/credits/dreamcast/
MobyGames. “Coaster Works.” Release and development record for Jet Coaster Dream, identifying Bottom Up as Japanese publisher and Bimboosoft as developer. Accessed October 15, 2026. https://www.mobygames.com/game/45632/coaster-works/
Game Developer Research Institute. “Bottom Up.” Company research identifying Bottom Up as a company established by former Natsume personnel, Shigeru Okamoto as president, and the company’s March 31, 2000 bankruptcy. Accessed October 15, 2026. https://gdri.smspower.org/wiki/index.php/Bottom_Up
MobyGames. “Bottom Up.” Company history and gameography, including Atsushi Okazaki among the company’s frequent collaborators and the March 31, 2000 bankruptcy date. Accessed October 15, 2026. https://www.mobygames.com/company/3699/bottom-up/
Game Developer Research Institute. “Talk:NatsumeAtari.” Research notes concerning Natsume personnel and the surviving lead connecting Atsushi Okazaki with educational software work discussed by Kochi University of Technology in 2003. Accessed October 15, 2026. https://gdri.smspower.org/wiki/index.php/Talk:NatsumeAtari
Game Developer Research Institute. “Talk:Credits Dump.” Research discussion preserving the tentative FarEast Brains lead involving Atsushi Okazaki. Accessed October 15, 2026. https://gdri.smspower.org/wiki/index.php/Talk%3ACredits_Dump