Project SEKAI: Colorful Stage! feat. Hatsune Miku officially released the full 2D animated music video for “Emerald” (エメラルド) on October 31, 2026. The video features six vocal characters representing different groups within the game, performing a song written and composed by Japanese musician Tatsuya Kitani.
The release also marks the first publicly announced production by LATENT ONE, a new animation studio established by Colorful Palette. “Emerald” itself was previously added to the rhythm game on September 30 as part of Project SEKAI's sixth anniversary celebration.
Quick Summary
- Game: Project SEKAI: Colorful Stage! feat. Hatsune Miku
- Japanese title: プロジェクトセカイ カラフルステージ！ feat. 初音ミク
- Song: Emerald / エメラルド
- Song category: 6th Anniversary Song
- Video format: 2D Music Video / 2DMV
- MV release date: October 31, 2026
- In-game song addition: September 30, 2026
- Songwriter: Tatsuya Kitani / キタニタツヤ
- Composer: Tatsuya Kitani
- MV vocals: Ichika Hoshino, Minori Hanasato, Kohane Azusawa, Tsukasa Tenma, Kanade Yoisaki, Hatsune Miku
- Number of vocal characters: 6
- Animation studio: LATENT ONE
- MV availability: released on YouTube
- Video channel: Project SEKAI Official YouTube
- Production status: LATENT ONE's first publicly announced production
- LATENT ONE parent company: Colorful Palette
- Studio establishment: October 2026
- Establishment announcement: October 31, 2026
- LATENT ONE president: Riku Tsukada
- Studio focus: animation planning, production, and project development
- Future plans: animated music videos and original animation
- Game developers: SEGA and Colorful Palette
- Game platforms: iOS and Android
- Sixth anniversary theme: WORLD LINK
- Anniversary website: available
Official Project SEKAI “Emerald” Music Video
“Emerald” Brings Six Characters Together in an Animated MV
The “Emerald” music video features Ichika Hoshino, Minori Hanasato, Kohane Azusawa, Tsukasa Tenma, Kanade Yoisaki, and Hatsune Miku in a musical presentation celebrating six years of Project SEKAI.
Rather than showing the characters exclusively through the rhythm game's usual stage presentation, the video uses a dedicated 2D animation approach. Several scenes feature characters playing musical instruments, including keyboards and guitars, accompanied by changing environments and lighting.
The combination of characters from different units is an important part of the anniversary presentation, connecting with the celebration's broader WORLD LINK theme.
Tatsuya Kitani's Anniversary Song Arrived in September
“Emerald” is Project SEKAI's sixth anniversary song, written and composed by Tatsuya Kitani. SEGA first announced the track on September 25 before adding it to the game on September 30, 2026.
Eight vocal options were announced for the in-game song. These include a Hatsune Miku Virtual Singer version, a six-Virtual-Singer version, a SEKAI version featuring five human characters and Miku, and five individual Another Vocal versions.
With the full MV released on October 31, fans now have a dedicated animated presentation of the anniversary song outside the game's rhythm gameplay.
LATENT ONE Debuts with the “Emerald” Music Video
An important development behind the release is LATENT ONE, an animation company established by Colorful Palette in October 2026.
According to CyberAgent's official announcement on October 31, LATENT ONE focuses on the planning, production, and development of animation projects. The studio is led by Riku Tsukada and based in Tokyo, Japan.
“Emerald” is the first production publicly credited to the studio. LATENT ONE plans to work on animated music videos while also developing original animation projects using its own creative approach.
Six Years of Project SEKAI
Project SEKAI celebrated its sixth anniversary on September 30, 2026, with various content releases, including its anniversary song, Virtual Live activities, celebratory illustrations, and community events.
The WORLD LINK theme highlights the relationships connecting players and characters throughout the game's history. “Emerald” serves as one of the celebration's main musical features by bringing characters from different units together.
The October 2DMV release extends the anniversary activities while introducing LATENT ONE's animation production capabilities to the Project SEKAI community.
Why This Matters
1) The anniversary song receives a dedicated animated production
The 2DMV allows the six vocal characters to be presented through visual direction beyond the game's usual performance format.
2) “Emerald” connects representatives from multiple units
Featuring six vocal performers reinforces the relationships between Project SEKAI's characters during the sixth anniversary.
3) LATENT ONE debuts with an established franchise
Beginning with Project SEKAI gives the new studio an opportunity to showcase its creative approach to an existing fan community.
Project SEKAI “Emerald” and LATENT ONE Information
Additional important information currently known:
- “Emerald” is Project SEKAI's sixth anniversary song
- the Japanese song title is エメラルド
- Tatsuya Kitani wrote the lyrics and composed the music
- the song was first announced during September's anniversary information releases
- it was added to the game on September 30, 2026
- eight vocal configurations were announced for the in-game song
- the full 2D animated music video premiered October 31, 2026
- the video was released through Project SEKAI's official channel
- Ichika Hoshino represents Leo/need
- Minori Hanasato represents MORE MORE JUMP!
- Kohane Azusawa represents Vivid BAD SQUAD
- Tsukasa Tenma represents Wonderlands×Showtime
- Kanade Yoisaki represents Nightcord at 25:00
- Hatsune Miku also performs in the MV version
- LATENT ONE handled animation production
- LATENT ONE was established in October 2026
- its establishment was publicly announced October 31
- Colorful Palette is LATENT ONE's parent company
- Riku Tsukada serves as president
- LATENT ONE handles animation planning and production
- the studio also intends to develop original animation
- “Emerald” is its first publicly announced production
- the sixth anniversary theme is WORLD LINK
- the game is jointly developed by SEGA and Colorful Palette
- Project SEKAI is available on iOS and Android
- the complete MV is available through Official YouTube
- the studio announcement is available through LATENT ONE Official X
- company information is available through the Official LATENT ONE Website
- studio establishment details were confirmed in the CyberAgent Official Announcement
- song information is available through SEGA Official Anniversary News
- sixth anniversary details are available through the Project SEKAI 6th Anniversary Website
Closing
The “Emerald” 2D animated music video brings Project SEKAI's sixth anniversary song back with new visuals featuring Ichika, Minori, Kohane, Tsukasa, Kanade, and Hatsune Miku.
Released on October 31, 2026, the video also marks LATENT ONE's first publicly announced production, introducing Colorful Palette's new animation studio through an established music and gaming franchise.
- Project SEKAI Official YouTube — Emerald 6th Anniversary Song Full 2D Music Video
- LATENT ONE Official X — Official Studio Announcement and Emerald Music Video Production
- CyberAgent — Official Announcement of LATENT ONE Establishment and Emerald 2DMV Release
- SEGA — Project SEKAI 6th Anniversary Song, Tatsuya Kitani, and September 30 Game Addition
- Project SEKAI — Official 6th Anniversary Website and WORLD LINK Information
