Mojib-Ribbon (モジブリボン Mojiburibon) is a music video game created by Masaya Matsuura as a pseudo-sequel to his earlier music game, Vib-Ribbon (1999, PS1). A direct sequel called Vib-Ripple was released in 2004. The releases are comparable to the releases of the earlier PaRappa series (also a Matsuura series) where the original was followed by a pseudo-sequel and then a direct sequel a few years later.
Whereas in Vib-Ribbon the gameplay centered around the player's interaction with the melody of the song being played, in Mojib-Ribbon the gameplay centers on the player's interaction with the lyrics. As such, the music employed in the game is heavily lyrics-oriented rap music. The game's art-style is centered on traditional sumi-e and Japanese kana calligraphy. This has led to claims that the game is incomprehensible to non-Japanese audiences, however the simplicity of gameplay have allowed numerous import gamers (typically also fans of Masaya Matsuura's oeuvre) to enjoy the game as well, and guides exist online regarding menu navigation instructions for non-Japanese speakers.
In Mojib-Ribbon, the player plays the part of Mojibri (モジブリ Mojiburi) (a name similar to that of Vibri from Vib-Ribbon), a character drawn in the sumi-e style who wishes to become a famous rapper (similar to PaRappa the Rapper) and to find the truest rap of them all. In each level, Mojibri walks around a circle of clouds as rap lyrics written in kana pass underneath. The player must press up on the joystick to get Mojibri to dip his fude in the suzuri and then down to get Mojibri to write the kana as he sings it. The songs are heavily rhythm-based raps, and the player must time the application of the fude to the washi during lyrics and to the suzuri during breaks.
Later in the game Mojibri is joined by a female friend named Mojiko (モジコ) and a huge robot called Osorezan 1999 (オソレザン一九九九 Osorezan ichikyūkyūkyū). These characters have individual calligraphy styles.
Source: Wikipedia, "Mojib-Ribbon", available under the CC-BY-SA License.