Atarashii Gakko no Leaders, Suiyoubi no Campanella, Klang Ruler, and SWEET STEADY will rock Happiness Arena! J-pop artists gather for the music festival event "HAPPINESS JAM 2026" on October 17th! ~A special event celebrating Nagasaki Stadium City's 2nd anniversary~

Nagasaki Stadium City is pleased to announce that, as a highlight event to commemorate its second anniversary, it will be hosting "HAPPINESS JAM 2026," a music festival event that will be held for the second time following last year's success, on (Sat), October 17, 2026.

 

■HAPPINESS JAM 2026 in HAPPINESS ARENA will be held on (Sat) October 17, 2026!

As a highlight event to celebrate the 2nd anniversary of Nagasaki Stadium City, we will be holding "HAPPINESS JAM 2026," a music festival event featuring J-pop artists, at the Happiness Arena within the facility, following last year's success.
Following last year's great success, this event will once again deliver an unprecedented musical experience. A diverse range of leading J-pop artists, including Atarashii Gakko no Leaders, Suiyoubi no Campanella, Klang Ruler, and SWEET STEADY, will gather at Happiness Arena. Artists that can be enjoyed by people of all ages, from children to adults, will come together to deliver a special stage filled with the excitement befitting the 2nd anniversary.

Furthermore, to celebrate its second anniversary, Nagasaki Stadium City will be hosting a variety of events throughout the entire complex, including the stadium and hotel, featuring gourmet food, entertainment, and more. We hope you will enjoy these events in conjunction with HAPPINESS JAM 2026.

 

■Four leading artists of the era have been confirmed to perform!

<New School Leaders>

Self-proclaimed "Japan's representatives of youth," they have garnered attention both domestically and internationally with their powerful dance choreography (all performed by the members) and unique live performances. They made their global debut in 2021 under 88rising, a label that promotes Asian culture to the world. Their signature song, "Otona Blue," has become a global hit, surpassing 3.3 billion views on TikTok.
After appearing on NHK's Kohaku Uta Gassen and performing solo at Coachella, AG! successfully completed their largest-ever tour in 2025, visiting 18 cities to commemorate their 10th anniversary. In 2026, they performed at major European festivals and held their solo concert, "AG! 11th Anniversary Show," at London's prestigious Roundhouse on July 19th. They continue to captivate audiences around the world, effortlessly transcending borders and genres.

 

<Wednesday Campanella>

A music unit formed in 2013. In 2021, they welcomed Utaha as their second lead vocalist and performed under a new system.
After the release of the music video for "Edison" in February 2022, it became a hot topic, mainly on social media, and has been viewed over 71 million times (as of March 2026), with cumulative streaming plays exceeding 100 million. In March 2024, they successfully held their first solo concert at the Nippon Budokan under the Utaha banner, titled "METEO SHOWER".

On (Wed), July 22, 2026, they will release the song "Ichigo Got it (feat. Peanut-kun)" featuring rapper and Vtuber Peanut-kun.

 

<Klang Ruler>

A five-member band consisting of two men and two women, who play music under the banner of New Age pop music.
Their sound is characterized by a blend of nostalgia and novelty, transporting listeners to various eras.
Formed in 2015, centered around vocalist and trackmaker yonkey, who has worked on songs like "Otona Blue" and "NAINAINAI" by Atarashii Gakko no Leaders. Their cover song "Timing" from the "MIDNIGHT SESSION" project has surpassed 2 billion total streams and achieved the all-time record of 5 consecutive weeks at number one on the TikTok Weekly Top 20.

 

<SWEET STEADY>

7-member idol group
"SWEET STEADY"

The members are Okuda Aya, Otoi Yui, Kurita Natsuka, Shiokawa Rise, Shoji Nagisa, Shiraishi Mayumi, and Yamauchi Sakina, a total of 7 people.
Formed in January 2024 as part of "KAWAII LAB.", a new project by ASOBISYSTEM to spread idol culture to the world.
"SWEET STEP," released in March 2026, became a sensation, mainly on TikTok, and has surpassed 600 million total views across social media platforms.

On August 23rd (Sun), their first solo arena concert will be held at Pia Arena MM.

 

■Event Overview

Date and Time: (Sat) October 17, 2026, Doors open 13:00 / Show starts 14:00 (tentative)
*Opening/show times are subject to change.

Venue: Nagasaki Stadium City HAPPINESS ARENA

 

<Ticket sales schedule>

◆Nagasaki Stadium City App Pre-sale - First Round ※First-come, first-served basis	(Sat), August 22, 2026 10:00 to (Sun) August 30, 23:59
◆First round of advance ticket sales through ticket agencies (Lawson Ticket) *Lottery	August 31, 2026 (Mon) 18:00 to September 11, 2026 (Fri) 23:59
◆Second round of advance ticket sales through ticket agencies (Lawson Ticket) *First-come, first-served basis	Monday (Mon) 14, 2026 18:00 to (Sun) September 20, 23:59
◆Nagasaki Stadium City App Pre-sale Round 2 *First-come, first-served basis	Monday (Mon) 14, 2026 18:00 to (Sun) September 20, 23:59
◆General sale *First-come, first-served basis	September 23, 2026 (Wed) 10:00 to October 14, 2026 (Wed) 22:00

*The schedule is subject to change depending on sales conditions.
* First-come-first-served sales will end as soon as the planned number of tickets is reached.

 

〇 [For high school students and younger] Nagasaki City Subsidy for Creating an Attractive Living Environment

This event is planned to be funded by a subsidy from Nagasaki City's project to create attractive living spaces, and we are currently preparing the application.
If your application is accepted, you will be able to purchase tickets at a discounted price if you are a high school student or younger (i.e., 18 years old or younger as of April 1, 2026).

~What is the Nagasaki City Subsidy for Creating Charming Living Environments?~
This is a Nagasaki City initiative aimed at allowing more Nagasaki citizens to enjoy theatrical performances, concerts, sporting events, and other events held at Nagasaki Stadium City. Utilizing donations from companies received through the "Nagasaki Stadium City Collaboration Excitement and Vitality Creation Project," Nagasaki City provides financial assistance to event organizers, enabling Nagasaki citizens to enjoy performances at discounted prices.

The application period is scheduled for late August to early September (details will be announced later). Please note that tickets already purchased cannot be changed to qualify for this discount, nor can they be canceled or refunded.

 

Organizer: Regional Creation Nagasaki Co., Ltd.
Planning and Production: Regional X Nagasaki Co., Ltd.

 

▼Click here for event details
https://www.nagasakistadiumcity.com/happiness-jam-2026/

 

■For your stay, please choose Stadium City Hotel Nagasaki

After enjoying the festival all day long, why not unwind in the hotel's hot springs and sauna with a view of the soccer stadium, and then enjoy a Nagasaki specialty at the breakfast buffet in the morning?
Please feel free to use it in conjunction with the event.

Hotel details can be found here:
https://www.nagasakistadiumcity.com/stadiumcityhotel/

 

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＜For the latest information on Nagasaki Stadium City, click here＞
・Official app: https://app.nagasakistadiumcity.com/apptop/move_studiumCityApp.html(*The above is the app download page, so it cannot be used on a PC.)
・Official website: https://www.nagasakistadiumcity.com/
・Official X https://x.com/nscproject
・Official Instagram https://www.instagram.com/nagasaki_stadiumcity/