About Restrictions on Card Usage

At UNION ARENA, our core game design concept is to allow characters from a wide variety of titles to come together and interact, while preserving the unique traits of each individual series. With new titles joining the game almost every month, one of UNION ARENA’s key appeals is its constantly improving the game environment.

At the same time, we are closely monitoring situations where certain decks show exceptionally high usage or win rates, raising concerns about a fixed or unbalanced play environment. To ensure that all players can enjoy a diverse and dynamic competitive experience, we are considering placing card usage restrictions—such as limiting the number of specific cards that can be included in a deck—based on the results of official and sanctioned tournaments. We will also continue to review and potentially lift existing restrictions on certain cards, taking into account changes in the overall metagame.

We are currently conducting a careful analysis of tournament results and deck usage trends since February 2025, and based on our findings, we are considering the following card restrictions and lifts.

Titles Under Consideration for Card Usage Restrictions

• ・CODE GEASS Rozé of the Recapture (Blue)
• ・Sword Art Online (Purple)

Titles Under Consideration for Card Restriction Lifts

• ・JUJUTSU KAISEN (Blue)

Scheduled Announcement and Effective Date

The final decisions regarding the upcoming card usage restrictions are scheduled to be announced and implemented according to the timeline below.

July 15, 2025 (Tue):Details of the changes will be announced on the official website and official X.
August 1, 2025 (Fri):Restrictions will be enforced in tournament regulations.

Further details will be published on the “Card Usage Restrictions” page of the official website at a later date. An announcement will also be made on our official X (formerly Twitter) account once the update is live.

We recognize that card usage restrictions in UNION ARENA have a significant impact on players' overall gameplay experience. As such, the operations team has engaged in numerous discussions and carefully monitored tournament trends before making these decisions with the utmost care and consideration. We sincerely apologize for any inconvenience this may cause, including the need to reconsider or adjust your existing deck builds.
However, we hope that these adjustments will contribute to a fresher and more exciting play environment, offering new strategic opportunities and renewed enjoyment in deck building. We kindly ask for your understanding and continued support.

Regarding Upcoming Titles

From spring through summer, we have revealed several upcoming titles through announcement events and various promotional activities.
We would now like to once again share with you the release schedule for the titles planned for launch in Japan.
If you have friends who enjoy anime or manga, we’d be delighted if you could let them know about UNION ARENA and what’s coming next!

July 25, 2025

〈Monogatari〉 Series

Rurouni Kenshin

August 29, 2025

SAKAMOTO DAYS

September 26, 2025

ARKNIGHTS

October 04, 2025

Rebuild of Evangelion

October 31, 2025

Kamen Rider BOOSTER PACK Vol.2

November 14, 2025

To LOVEru
Memory of Heroines

Release Schedule: To Be Announced

Solo Leveling

Kingdom

and more

We will also be sharing the latest UNION ARENA updates at the “UNION ARENA Special Stage 2025”, taking place at the Jump Victory Carnival 2025 in Tokyo on Sunday, July 13.

At the recent presentation, we announced that two new titles would be revealed at Jump Victory Carnival. However, we’re excited to share that we are now ready to unveil one more additional title—bringing the total to three new titles joining UNION ARENA! These include titles scheduled for release within the year, so please look forward to the announcements!

I’m personally looking forward to experiencing the excitement of the stage together with all of you at the venue. For those who are unable to attend in person, we have a live stream planned for the day as well—so we hope you’ll tune in and enjoy the event with us!

In Conclusion

UNION ARENA is about to celebrate its 2.5-year anniversary, and the number of participating titles has now surpassed 40 series. We will continue striving to exceed your expectations with even more exciting developments in the future.

We are also preparing a variety of initiatives to ensure that all players can fully enjoy our upcoming events.Please look forward to what’s to come!

We sincerely appreciate your continued support for UNION ARENA.

UNION ARENA Development Producer
Yuki Kadota