Overview
＊ハロー、プラネット。 (＊Hello, Planet.) is a VOCALOID track by Japanese composer and producer sasakure.UK, featuring Hatsune Miku on vocals. Originally released in 2010 on the album ボーカロイドは終末鳥の夢をみるか？ (Do VOCALOIDs Dream of Terminal Birds?), the song is the fourth chronological entry in sasakure.UK's 終末 (end) series, a thematic set that also includes ぼくらの16bit戦争 and ワンダーラスト. The series explores post-apocalyptic and existential motifs through bright, pop-infused compositions, a contrast that defines the song's charm.
Lyrically, ＊ハロー、プラネット。 paints a serene post-apocalyptic morning: waking alone in a shelter, finding the mailbox empty, and greeting the world with the repeated, sing-song phrase オハヨーハヨー (Ohayō-hayō), a playful twist on the standard Japanese "good morning." This greeting reaches toward a coelacanth's tail, the Sphinx's riddle, the rhythm of the galaxy, and a figure held only in memory. The lyrics toggle between childlike wonder and quiet loneliness, a hallmark of sasakure.UK's narrative style.
In maimai, ＊ハロー、プラネット。 was added to GreeN on November 14, 2013, with five Standard-difficulty charts. The Standard Expert chart was designed by はっぴー and the Master chart by mai-Star. After being removed from non-Japanese versions of maimai DX, the song saw a revival in BUDDiES (December 2023) with a full set of DX charts: Basic, Advanced, Expert (designed by Luxizhel), and Master (designed by 鳩ホルダー). Both the Standard and DX Master charts sit at level 12+ with a constant of 12.8, making them notable challenges within their respective chart families. The song also appears in CHUNITHM and オンゲキ, with different edit lengths across games, the maimai cut runs 2:01, while the CHUNITHM version is longer at 2:24.
Videos
Charts
DX
BASIC
2(2)
113 notesDesigner: -|Tap 87Hold 9Slide 4Touch 8Break 5
ADVANCED
7(7)
260 notesDesigner: -|Tap 214Hold 18Slide 9Touch 11Break 8
EXPERT
9(9)
349 notesDesigner: Luxizhel|Tap 224Hold 15Slide 50Touch 47Break 13
MASTER
12+(12.8)
538 notesDesigner: 鳩ホルダー|Tap 303Hold 43Slide 88Touch 88Break 16
Trivia
- ＊ハロー、プラネット。 is the fourth song chronologically in sasakure.UK's 終末 (end) series, which also includes ぼくらの16bit戦争 and ワンダーラスト.
- Unused data for the song existed since the very first version of maimai (2012), meaning it was planned very early in the game's life but only released a year later in GreeN.
- The Asian English version of maimai romanised the title as ＊Hello, Planet., preserving the asterisk prefix.
- In maimai, the in-game genre for the song shifted over time: it debuted under VARIETY in GreeN, moved to niconico from GreeN PLUS through ORANGE PLUS, and finally settled as niconico & VOCALOID from PiNK onward.
- The song's jacket art was updated between the GreeN-era Standard release and the BUDDiES-era DX release, the original GreeN jacket features a different illustration.
- A DX Collection title called オハヨーハヨー can be earned by playing the song three times in a single credit.
- The maimai and オンゲKI cuts of the song (2:01) are shorter than the CHUNITHM cut (2:24), with certain lyrical sections exclusive to each version.
- The recurring lyric オハヨーハヨー is a deliberately distorted, childlike version of おはようございます (ohayō gozaimasu, 'good morning'), reflecting the song's theme of greeting a quiet, post-human world.
- sasakure.UK composed, arranged, wrote the lyrics for, and created the music video for the song.
- ＊ハロー、プラネット。 was removed from non-Japanese maimai versions starting with maimai DX, then revived for Asian territories in maimai DX BUDDiES (March 2024) and for China in 舞萌DX 2024 (March 2025).
FAQ
- Who composed ＊ハロー、プラネット。?
- The song was composed, arranged, and written by sasakure.UK, a Japanese producer known for VOCALOID and rhythm-game contributions. The vocals are provided by Hatsune Miku.
- What is ＊ハロー、プラネット。 about?
- The lyrics depict waking alone in a post-apocalyptic shelter and greeting a silent world with オハヨーハヨー (a distorted 'good morning'). Despite the lonely setting, the tone is warm and curious, the singer greets a coelacanth's tail, the Sphinx's riddle, the galaxy's rhythm, and a cherished person who exists only in memory.
- What album is ＊ハロー、プラネット。 from?
- It was originally released on sasakure.UK's 2010 album ボーカロイドは終末鳥の夢をみるか？ (Do VOCALOIDs Dream of Terminal Birds?).
- Is ＊ハロー、プラネット。 part of a series?
- Yes, it is the fourth chronological entry in sasakure.UK's 終末 (end) series, a set of songs sharing post-apocalyptic themes. Other entries include ぼくらの16bit戦争 and ワンダーラスト.
- Why was ＊ハロー、プラネット。 removed from and later readded to maimai?
- The song was removed from non-Japanese versions of maimai starting with maimai DX, presumably due to licensing constraints. It was revived for Asian regions in maimai DX BUDDiES (March 2024) and for China in 舞萌DX 2024 (March 2025), alongside a new set of DX charts.
- Who designed the MASTER charts for ＊ハロー、プラネット。 in maimai?
- The Standard MASTER chart (GreeN era) was designed by mai-Star. The DX MASTER chart (BUDDiES era) was designed by 鳩ホルダー. Both charts are level 12+ with a constant of 12.8.
- Does ＊ハロー、プラネット。 appear in other rhythm games?
- Yes, it was added to CHUNITHM CRYSTAL in February 2020 and to オンゲキ PLUS in March 2019. The CHUNITHM version uses a longer 2:24 edit of the song, while maimai and オンゲキ use a 2:01 cut.
