Scarlet Lance is an instrumental track by MASAKI (Masaki Mori), a composer on TAITO's in-house sound team ZUNTATA. It originally appeared in Groove Coaster 3 (officially subtitled 3EX Dream Party / LINK FEVER), TAITO's own arcade rhythm game, before being picked up as part of the Tenkaichi Otogesai (天下一音ゲ祭)—a recurring inter-company event that circulated select songs across competing arcade rhythm game franchises. Through this program, Scarlet Lance crossed over into four different game series: Taiko no Tatsujin, SOUND VOLTEX, CHUNITHM, and finally maimai. MASAKI joined ZUNTATA in November 2015 and made his debut under the alias 座和々 (Zawawa) in Groove Coaster. Scarlet Lance showcases the hallmarks of his style: a relentless 185 BPM tempo, distorted synth leads layered with orchestral stabs, and a driving rock rhythm section that builds into a dramatic climax. The track is entirely instrumental, letting the composition speak through its melodic hooks and dynamic shifts rather than lyrics. In maimai, Scarlet Lance debuted in FiNALE on December 13, 2018, initially limited to JAIA-member arcades before rolling out to all regions the following year. Its MASTER chart, designed by サファ太 (Safata), carries a difficulty constant of 14.2 and features 1,036 notes packed into the song's 2:07 runtime—a dense, high-intensity arrangement that reflects the track's unrelenting energy. The EXPERT chart, laid out by LabiLabi, sits at 12.9 and offers a demanding warm-up for players working their way up. Over subsequent maimai DX version updates, the chart levels were adjusted upward to keep pace with the game's evolving difficulty scale, cementing Scarlet Lance's place as a staple boss-tier track in the game-variety category.