Idemitsu - Space College - Kikenbutsu no Yasashii Butsuri to Kagaku Volume 6 represents one of the most obscure corners of the Famicom library. Developed as an internal training tool for the Idemitsu Kosan petroleum company, this software was never intended for public sale, serving instead as a preparatory guide for the "Kikenbutsu" (Hazardous Materials) handling examination. Volume 6 specifically focuses on the "gentle physics and chemistry" involved in managing volatile substances, using a space-themed educational interface to guide employees through complex regulations. Because of its corporate origins, the cartridge saw an incredibly limited production run, making it a ghost even within the Japanese secondary market.
In terms of gameplay, the title functions primarily as an interactive textbook and quiz suite rather than a traditional video game. Players navigate through text-heavy modules that explain scientific principles relevant to petroleum management, such as flashpoints, vapor pressure, and chemical reactions. The "Space College" branding adds a quirky visual flair to what is otherwise a dry, academic experience, featuring pixelated mascots and futuristic UI elements typical of early 90s Japanese educational software. For the non-Japanese speaker, however, the experience is essentially impenetrable, as the value lies entirely in the specialized technical vocabulary presented in its testing phases.
From a historical perspective, the Idemitsu series is a fascinating example of the Famicom being utilized for professional development beyond the reach of the consumer market. These cartridges were distributed directly to Idemitsu facilities and employees, often resulting in most copies being discarded or lost over the decades. As part of a larger set of educational tools, Volume 6 is prized not for its entertainment value, but for its extreme scarcity and its role as a cultural artifact from an era where Nintendo’s hardware was viewed as a viable platform for corporate training. It stands alongside other elusive "Not for Sale" titles as a pinnacle of Famicom completionist collecting.
