初音ミクの激唱 (Hatsune Miku no Gekishou, "The Intense Singing of Hatsune Miku") is a landmark Vocaloid original song by the unit Storyteller, the creative partnership of composer cosMo@暴走P (cosMo@Bousou-P) and lyricist GAiA, who are also real-life brothers. Originally uploaded to niconico on July 9, 2010, it was composed as a dedicated boss song for the rhythm game Hatsune Miku -Project DIVA- 2nd, continuing the narrative thread of cosMo's earlier works 初音ミクの暴走 and 初音ミクの消失. The song's subtitle, 「最高速・最高圧縮の喜びの歌」("The highest-speed, highest-compression song of joy"), signals its relentless BPM of 200 and dense, near-screamed vocal delivery, a deliberate contrast to the melancholic themes of its predecessor, 初音ミクの消失. In maimai, 初音ミクの激唱 debuted on August 9, 2018 as part of the MiLK PLUS update, arriving through a cross-title collaboration event that simultaneously brought the song to CHUNITHM STAR PLUS and オンゲキ (ONGEKI). Players initially unlocked it by playing the song in ONGEKI first, creating a unique multi-arcade unlock path. The maimai version uses a shorter edit (2:24) of the full composition. The MASTER chart, designed by チャン@DP皆伝 (Chan@DP Kaiden), has undergone level revisions across maimai versions, starting at level 13, it was promoted to 14 in でらっくす PLUS and now sits at 14.5 as one of the most demanding charts in the niconico & Vocaloid category. Its Expert chart, designed by 華火職人 (Hanabi Shokunin), also proved challenging enough to warrant a level bump over time.