[Post-event report] Nagasaki Stadium City 2nd Anniversary Event: Music festival "HAPPINESS JAM 2026" held at HAPPINESS ARENA!

(Sat) October 17, 2026, as a highlight event to celebrate the second anniversary of the opening of Nagasaki Stadium City, we held the music festival "HAPPINESS JAM 2026" at "HAPPINESS ARENA".
Following last year's success, a diverse group of artists representing the J-POP scene gathered once again. From Atarashii Gakko no Leaders and Suiyoubi no Campanella to Klang Ruler, SWEET STEADY, and opening act KAWAII LAB.SOUTH and Misaki, the star-studded lineup delivered breathtaking performances, filling the venue with warm applause and enthusiasm throughout the day.

■Opening Act
[Misaki]
The opening act was Misaki, a singer-songwriter from Nagasaki Prefecture. As her acoustic guitar filled the stage and she began to sing, the entire venue was enveloped in a gentle and warm atmosphere.
She expressed the poignant feelings of love and realistic emotions depicted in the songs with her sweet and clear voice. "It's my first time performing live on such a big stage, and I'm so happy," she said, expressing her joy at performing in her hometown of Nagasaki. In addition to "Believe," the ending theme song for the TV anime "Kingdom," she asked the audience to participate in a call and response of "OH BABY" during "I LOVE YOU," and smiled broadly amidst the thunderous applause.

SET LIST 1. Cactus 2. Believe 3. Towards the Future (Kiroro) 4. What if tomorrow never comes? 5. I LOVE YOU

【KAWAII LAB.SOUTH】
Next up was KAWAII LAB.SOUTH, whose stage was illuminated by a sea of orange penlights that lit up in unison, vividly coloring the audience.
In "NEW KAWAII," they added a special arrangement, saying, "We think everyone gathered at Happiness Arena is NEW KAWAII," and instantly energized the venue with their adorable dance. Furthermore, they captivated the audience with an arrangement of "Baibai FIGHT" transformed into "Baibai KAWAII LAB.SOUTH" and a cute performance.

SET LIST 1. Pure in the world 2. NEW KAWAII 3. Wouldn't it be fine to just use a whole peace sign? 4. Double the fight!

■Main Stage
【Klang Ruler】
The first act on the main stage was Klang Ruler, a five-member band of men and women who play new-age pop music. When Chihiro Yasuda called out, "Are you enjoying Happiness Jam?", the audience responded with loud cheers and applause.
"This is my third time in Nagasaki since my first visit three years ago. I'm so happy to be able to sing here today in this city that's getting more and more vibrant," she said, expressing her joy that this homecoming concert was especially special for the members who are from Kyushu.
As they captivated the audience with their electro-pop sound and catchy melodies, before performing "city rats" in the middle of the show, they shared an anecdote about how the feeling of freedom they experienced upon arriving in Nagasaki and looking up at the sky brought to mind their hometown, family, and close friends. Delivered with that nostalgia, "city rats" left a deep impression, gently awakening the "important places and people" deep within each person's heart, and the venue was filled with applause.

SET LIST 1. Unbelievable 2. Honey Mani 3. They don't understand at all. 4. Timing 5. City rats 6. Immortality 7. Adult Blue 8. Teenage Blue 9. Lullaby

[New School Leaders]
As soon as the chimes rang out, the excitement in the venue reached its peak. They engaged the audience with their familiar greeting, "Hello everyone at Happiness Jam, WE ARE Atarashii Gakko no Leaders!"
During their signature song "Otona Blue," SUZUKA descended into the audience, captivating the crowd. Upon discovering dolls of the band members in the audience, SUZUKA brought them back onto the stage. In the following MC segment, she smiled and introduced the dolls, saying, "This is our second time performing in Nagasaki. About five years ago, when I visited Nagasaki University, I discovered these artistic and adorable dolls made by the students! They brought something that I associate with Nagasaki!" In the subsequent performance of "Dance Dance," she used the memorable dolls on stage to create a unique dance routine, thrilling the audience.
"We've connected with people through music, transcending language barriers. Today, we have people of all ages here, but our socks say 'Representatives of Japanese Youth.' If you enjoy the present to the fullest, people of any generation can feel the spirit of youth!" they declared passionately before launching into their final song, "One Heart." As the entire venue was enveloped in an incredible sense of excitement and unity, the band concluded their wildly enthusiastic performance with a fitting "At ease, attention, bow!" greeting, just like the other members of Atarashii Gakko no Leaders.

SET LIST 1. Go Wild 2. Chanka Chanka 3. Adult Blue 4. Oi AG! 5. TTTTOKYO 6. Dance Dance 7. UTAGE HIKARU 8.Pineapple Kryptonite (Yohji Igarashi Remix) 9. Fly High 10. Tokyo Calling 11. One Heart

[Wednesday Campanella]
Utaha (Wednesday Campanella) made a surprise appearance not from the stage, but from the back of the audience, high-fiving each and every person in the audience. She said, "Last year I performed as 'Utaha,' but this year I'm back as Wednesday Campanella!" and got the crowd excited.
During the performance of "Chateaubriand," band member Kenmochi Hidefumi appeared on stage wearing a cow costume. The audience responded with a loud "Chateaubriand!", and the venue was filled with Wednesday Campanella's signature pop and humorous world.
She delivered the message, "Every day, wear the clothes you like, do the makeup you like, do the things you like, and love yourself to the fullest," and during "Maneki Neko" (beckoning cat), the entire audience united in a beckoning gesture. Finally, she left the stage with the words, "I love you all!", leaving behind a beaming smile.

SET LIST 1. Monster Island 2. Buckingham 3. Chateaubriand 4. Prince Shōtoku 5. Scipio 6. Tamamo no Mae 7. Wo Ai Ni 8. Mermaid 9. Edison 10. Maneki-neko (beckoning cat)

【SWEET STEADY】
SWEET STEADY closed out "HAPPINESS JAM 2026." As the entire audience was illuminated with colorful penlights in the members' respective colors, the members, performing their first live show in Nagasaki, exchanged greetings. Kurita Natsuka expressed her enthusiasm, saying, "Since this is HAPPINESS ARENA, we want to make everyone in the venue happy!" and a huge cheer erupted from the audience.
During the MC segment, the conversation revolved around Nagasaki-style backstage catering, including Sasebo burgers, sara udon chocolate, and Turkish rice, and the members smiled as they said, "We want to make lots of memories in Nagasaki." On stage, they performed songs that fully showcased SWEET STEADY's signature cuteness. After their performance, the audience responded with warm applause and shouts of "Thank you!" They declared, "We'll do our best to be able to come back to Nagasaki again!" and the event came to a successful close.

SET LIST 1. The signal to begin 2DASH!!! 3. Kawaii Collection 4. Water-discard time 5. Give me some HAPPY! 6. Call me, tell me 7. Sweet Cafe 8. Like a gerbera flower 9. SWEET STEP 10. SWEET BLOOM

It was a day where we were able to share "happiness" with many people who came from Nagasaki and all over the country. Nagasaki Stadium City will continue to bring lots of excitement and inspiration to your daily lives.
Thank you very much to everyone who came. We are sincerely looking forward to seeing you all again next year at "HAPPINESS ARENA".

ジャパネット公式オウンドメディア Japanet Liveにて、ファッションスナップも公開していますので、ぜひご覧ください。

【ファッションスナップ】ハピネスジャム2026 ～ファンのコーデ一気見せ！～

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