Overview
エイプリルスター (April Star) is a commissioned demo song for Synthesizer V AI Kasane Teto (重音テト), the fan-developed voicebank that has become a staple of the VOCALOID and singing-synthesis community. Composed, arranged, and written by OSTER project, a veteran producer known for contributions to the Bemani rhythm game series and numerous VOCALOID works, the track was first released on April 27, 2023 alongside the launch of the Synthesizer V AI version of Teto. Though it debuted without a music video, a full promotional PV by illustrators aco and たま arrived later that year on October 10 (Teto's Day / テトの日), marking the unofficial holiday's fifth observance.
The song entered maimai DX PRiSM on December 6, 2024 as part of the niconico & VOCALOID genre category. Its lyrics trace a journey of self-doubt and resolve, asking whether dreams are worth chasing even after repeated failure, then affirming that unwavering belief is what makes those dreams real. Spring and star imagery runs through the chorus, with the "April Star" of the title representing a light that shines in the spring night sky, cutting through darkness. OSTER project's signature pop sensibility, paired with Teto's distinctively bright Synthesizer V AI voice, gives the track an energetic yet reflective character at 185 BPM.
On the charting side, the Expert layout was designed by みそかつ侍 (Misokatsu Samurai) and the Master chart (level 13, constant 13.2) by Jack, both regular contributors to the maimai DX series. The song was later added to the Asian version of maimai on May 9, 2025, and to the Chinese version (舞萌DX 2025) on March 25, 2026.
Videos
Charts
DX
BASIC
4(4)
241 notesDesigner: -|Tap 213Hold 13Slide 3Touch 6Break 6
ADVANCED
7(7)
363 notesDesigner: -|Tap 310Hold 25Slide 12Touch 13Break 3
EXPERT
10(10)
574 notesDesigner: みそかつ侍|Tap 433Hold 44Slide 48Touch 4Break 45
MASTER
13(13.2)
852 notesDesigner: Jack|Tap 649Hold 64Slide 98Touch 9Break 32
Trivia
- エイプリルスター was originally released on April 27, 2023 as a demonstration song for the newly released Synthesizer V AI voicebank of Kasane Teto (重音テト).
- The song initially had no promotional video; a full music video by illustrators aco and たま was later published on October 10, 2023, Teto's Day (テトの日), which that year marked the fifth observance of the fan-celebrated date (10/10, a pun on テト).
- OSTER project, who composed, arranged, and wrote the lyrics for this track, is a long-established producer in the VOCALOID and doujin music scene, with rhythm game appearances spanning Beatmania IIDX, SOUND VOLTEX, and the maimai series itself.
- The Master chart, designed by Jack at level 13 (constant 13.2), features 852 total notes including 98 Slide notes and 32 Break notes, characteristic of Jack's technically demanding layouts.
- The Expert chart was designed by みそかつ侍 (Misokatsu Samurai) and contains 574 notes, with a notably high Break-note count of 45 for its level-10 difficulty.
- In the Asian version of maimai, エイプリルスター was added on May 9, 2025; in the Chinese version (舞萌DX 2025), it arrived on March 25, 2026, over a year after its Japanese debut.
- The song's title combines エイプリル (April, referencing its April release) and スター (Star), reflecting the lyrical motif of a star blooming in the spring sky.
FAQ
- Who composed エイプリルスター (April Star)?
- エイプリルスター was composed, arranged, and written by OSTER project, a veteran producer in the VOCALOID and rhythm game music scene.
- Who sings エイプリルスター?
- The vocals are provided by Kasane Teto (重音テト), using her Synthesizer V AI voicebank. This track was originally released as a demo song for that voicebank.
- When was エイプリルスター added to maimai?
- It was added to maimai DX PRiSM on December 6, 2024 in Japan. The Asian version received it on May 9, 2025, and the Chinese version (舞萌DX 2025) on March 25, 2026.
- What are the chart difficulties for エイプリルスター in maimai?
- The song has four DX chart difficulties: Basic (level 4), Advanced (level 7), Expert (level 10, constant 10.2), and Master (level 13, constant 13.2).
- Who designed the Expert and Master charts for エイプリルスター?
- The Expert chart was designed by みそかつ侍 (Misokatsu Samurai), and the Master chart was designed by Jack.
- What is the BPM of エイプリルスター?
- The song has a BPM of 185.
- What is エイプリルスター about?
- The lyrics explore themes of perseverance through doubt and ridicule. The narrator questions whether they can achieve their dreams after repeated failures, ultimately affirming that unwavering belief and conviction make those dreams real. The title and chorus use spring and star imagery, a star shining in the April night sky.
- Did エイプリルスター originally have a music video?
- No, the song was released on April 27, 2023 without a PV. A music video by aco and たま was later published on October 10, 2023 (Teto's Day / テトの日) to mark the occasion.
