Shogakukan is a prominent Japanese publisher that expanded into the video game market, publishing titles such as Kekkon: Marriage and several entries in the Sotsugyou (Graduation) franchise, including Sotsugyou Crossworld, Sotsugyou III: Wedding Bell, and Sotsugyou Album. The company also published educational software, such as the Kageyama Method math training games for the Nintendo DS.
The company's venture into interactive software began in the early 1990s, utilizing CD-ROM technology to distribute multimedia content such as
Hyper Catalog 2 (1992). As the fifth-generation console era emerged, the publisher targeted the growing simulation genre. This led to the release of
Kekkon: Marriage (1995), a virtual relationship title that debuted on the PC-FX before expanding to other platforms.
Building on this foundation, the publisher secured a significant role in the
Sotsugyou (Graduation) series. They handled the publication of
Sotsugyou Crossworld (1997) for the PlayStation and Sega Saturn, followed by the mainline sequel
Sotsugyou III Wedding Bell (1998) and the fan-oriented compilation
Sotsugyou Album (1998). These releases solidified the company's presence in the bishoujo and life simulation markets of the late 1990s.
In the mid-2000s, the publisher pivoted toward the burgeoning "brain training" phenomenon on handheld consoles. They developed a highly successful line of educational software based on the pedagogy of educator Hideo Kageyama. This initiative produced
Kageyama Method Masu x Masu Hyaku Masu Keisan (2006) and its digital repetition counterpart
Kageyama Method Dennou Hanpuku: Masu X Masu Hyaku Masu Keisan (2006), which utilized the Nintendo DS touch screen to teach grid-based mathematics.