Project Sekai Unleashes a Wave of New Content: Taiko no Tatsujin Crossover, Sanrio Rerun, and Fresh Beats!

New Melodies from Top Creators
Drumming Up Fun with Taiko no Tatsujin
Sanrio Characters Collaboration Returns
Expansive Music Library Updates
Engaging Events and Live Experiences
“MUSIC&DINER Melopale” Pop-up Cafe

New Melodies from Top Creators

Two acclaimed creators, Hayashikei and Namiguru, are set to contribute brand-new songs to the game. Hayashikei will provide a track for the unit Leo/need, while Namiguru will craft a song for Wonderlands x Showtime. These additions will soon be integrated into the rhythm game, offering players new challenges and sonic landscapes.

Namiguru shared their enthusiasm for the collaboration, stating, “Together with the Wonderlands x Showtime members, I created a happy song with the theme ‘Leap out and be yourself!’ Let’s go find lifelong treasures beyond our cramped daily lives! ‘Ready, set, Wonderpyoi🐰!'” This vibrant message perfectly captures the spirit of the new music.

Drumming Up Fun with Taiko no Tatsujin

A special two-month tie-up with the beloved Japanese drum rhythm game, “Taiko no Tatsujin,” is slated to begin on February 21, 2026. This collaboration will introduce three iconic “Taiko no Tatsujin” songs to “Project Sekai,” playable in a unique “Taiko no Tatsujin Mode” featuring special sound effects and voices.

Players can also acquire limited-edition avatar items inspired by “Taiko no Tatsujin” mascots, Don-chan and Katsu-chan. Furthermore, a collaborative project for the arcade version of “Taiko no Tatsujin” is in the works, promising even more crossover excitement.

Tie-up Song Addition Schedule:

February 21 (Sat): “Saitama 2000” (Lyrics/Composition: LindaAI-CUE(BNSI))
February 22 (Sun): “Hatsune Miku no Shoushitsu -Gekijouban-” (Lyrics/Composition: cosMo@BousouP)
February 23 (Mon): “Yugen no Ran” (Composition: Zeami)

Sanrio Characters Collaboration Returns

The popular collaboration with Sanrio Characters, first held in December 2023, is making a comeback from February 5 to February 19, 2026. This rerun will bring back the special collaboration gacha, “[Rerun] SEKAI de Hello♡Wonderful Encounters Gacha,” featuring ★4 members with Sanrio character headbands and live costumes. Players can also receive “Hello Kitty’s Apple” (a live bonus drink) through a login campaign, and the “Hello Kitty Full Set” will be re-released in the virtual shop.

The event includes a login story and the return of the special area, “Puro Land Sekai,” offering unique conversations. A new “Collaboration Commemorative Stamp Mission” will allow players to earn blueprints for exclusive collaboration-themed furniture to decorate their “My Sekai” spaces.

Expansive Music Library Updates

“Project Sekai” continues to enrich its music library with numerous additions. A “SNOW MIKU Song Addition Campaign” will introduce nine past SNOW MIKU theme songs, celebrating the winter-themed virtual singer.

Furthermore, five new rhythm game songs are slated for release, including “Aria,” a winning entry from the “Let’s Make Together! 31st Song Contest Proseka NEXT,” and “Maku wo Oroso, Parade e” and “Ribbon,” which topped the “The VOCALOID Collection ~2025 Summer~” rankings.

Finally, the popular song “VIVA HAPPY” will receive an “APPEND” difficulty chart, providing an exciting new challenge for seasoned players.

Engaging Events and Live Experiences

The game also announced a “Valentine Login Campaign” from February 14 to 15, 2026, offering special chocolates, a unique stamp, and fragments of thought as rewards.

Excitingly, “Proseka Unit Fan Meetings” are scheduled to take place in five cities across Japan. These events will feature the unit’s voice actors in short live performances, talk shows, quizzes, and live voice acting. Each performance will include three original songs (game size).

The first two confirmed events are:

“Proseka Unit Fan Meeting MORE MORE JUMP! in Miyagi”
- Date: April 12, 2026 (Sun)
- Venue: Natori City Cultural Hall Main Hall
- Cast: Yui Ogura, Mayu Yoshioka, Ai Furihata, Rina Honnizumi
“Proseka Unit Fan Meeting Vivid BAD SQUAD in Hyogo”
- Date: May 16, 2026 (Sat)
- Venue: Kobe International House Kokusai Hall
- Cast: Akina, Tomomi Jiena Sumi, Fumiya Imai, Kento Ito

Updates were also provided for “Sekai Symphony 2026,” revealing guest appearances by voice actors Karin Isobe, Mayu Yoshioka, Tomomi Jiena Sumi, Machico, and Hinata Sato. An “Instrumental Harmony” version of the symphony will feature Ruriko Noguchi as MC and Jin as a talk guest. Performances are set for Osaka (June 7), Yokohama (June 13), and Tokyo (August 11).

“MUSIC&DINER Melopale” Pop-up Cafe

A new pop-up cafe, “MUSIC&DINER Melopale,” is set to open temporarily, conceptualized as a diner for music lovers within the “Project Sekai” universe. The key visual is handled by Mogelatte, and the interior will boast a Y2K aesthetic with new-retro music equipment. The cafe will offer unique food menus, original merchandise featuring the key visual, and special birthday menus for characters celebrating during the event period.

Reservations for the cafe are currently being accepted via a pre-lottery system on the official “MUSIC&DINER Melopale” website, with a photo-style sticker as a pre-booking bonus. The cafe will run from March 12 to April 19, 2026, across various locations in Tokyo, Aichi, Osaka, and Miyagi.

These extensive updates demonstrate “Project Sekai”‘s ongoing commitment to delivering fresh and engaging content. The blend of new music, exciting collaborations, and interactive events not only enriches the game experience but also strengthens its position within the broader kawaii culture landscape. Such dynamic engagement ensures that virtual singers and their vibrant worlds continue to captivate audiences, fostering a global community around unique Japanese digital entertainment.

For more information, please visit the official website and social media channels: