First Collaboration Event with "Mezzo Piano," a Popular Character Trending with the Heisei Revival! Holding "The 'Love' of That Day Lasts a Lifetime. Mezzo Piano Colorful Party"
17LIVE and mezzo piano junior are holding their first collaboration event, "Mezzo Piano Colorful Party," from May 1 to May 15, 2026, leveraging the Heisei revival boom. They aim to attract and activate live streaming users by offering popular character goods and digital prizes.
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- 📰 Published: May 2, 2026 at 00:00
- 🔍 Collected: May 1, 2026 at 15:32
- 🤖 AI Analyzed: May 1, 2026 at 15:45 (13 min after Collected)
17LIVE Inc. (Shibuya-ku, Tokyo; Representative Director: Jean Hong-hui; URL: https://jp.17.live/), operating "17LIVE," Japan's largest live streaming app, announces its first collaboration event, "The 'Love' of That Day Lasts a Lifetime. Mezzo Piano Colorful Party," with "mezzo piano junior," an original brand developed by Narumiya International Co., Ltd. (Shiba Koen, Minato-ku, Tokyo; Representative Director and Executive President: Daisuke Hosaka). The event is scheduled to be held from Friday, May 1, 2026, to Friday, May 15, 2026.
"17LIVE" continuously hosts various collaboration projects and events with the aim of allowing both existing live streamers (broadcasters) and those who have never live streamed before to enjoy live streaming.
"mezzo piano junior" is a fashion brand for teens that gained significant attention and swept the trend among elementary and junior high school students in the early 2000s, with its original characters like "Berrie-chan" achieving immense popularity. Furthermore, in response to the unprecedented "Heisei revival boom" of recent times, reissued items have become a hot topic, generating widespread excitement from adults who grew up with "mezzo piano" to the younger generation of the Reiwa era. "17LIVE" decided to hold this event with the hope that this first collaboration with a trending brand leading the Heisei revival boom will create buzz and serve as an opportunity to convey the joy of live streaming to more people.
The "The 'Love' of That Day Lasts a Lifetime. Mezzo Piano Colorful Party" event is open to all "17LIVE" users. During the event period, collaboration gifts (paid) with "mezzo piano" motifs will be available. Users who meet certain conditions and those ranking high will receive exclusive "mezzo piano" digital prizes and official goods such as pouches and nail tips featuring "Berrie-chan." Since the achievement conditions vary depending on the goods, please check the event page within the "17LIVE" app for details.
Please pay attention to this first collaboration event with "mezzo piano," which is leading the Heisei revival boom.
The outline of "The 'Love' of That Day Lasts a Lifetime. Mezzo Piano Colorful Party" is as follows:
■ Event Period: Friday, May 1, 2026, to Friday, May 15, 2026
■ Participation Requirements: "17LIVE" users
■ Main Prizes (partial list) *All are images only
・Digital Prizes (partial)
Mezzo Piano (Berrie-chan) Collaboration Badge, Collaboration Profile Background
・Goods (partial)
Berrie-chan Nail Tips, Face Pouch 【Berrie-chan】
Bangs Clip 【Devilly-chan】, Face Mirror 【Blue Berrie-chan】
Berrie-chan Wish Core Heart Trainer, 【Baby Berrie-chan】Gauze Blanket【Organic】
*Event period and content are subject to change without notice.
*For other prizes and event details, please refer to the event page within the "17LIVE" app.
About "mezzo piano junior":
A brand for glamorous and romantic girls. Offers styles ranging from elegant to trendy casual.
Official Online Shop "NARUMIYA ONLINE": https://www.narumiya-online.jp/shop/brand/20/
Instagram: https://www.instagram.com/mezzopianojunior_official/
How to Watch "17LIVE":
Please download the free "17LIVE" app from below and register an account (*).
App Download: https://17apps.onelink.me/i7CY/17LivePR
*Some paid menus/content are available within the app. Communication charges are the responsibility of the customer.
About "17LIVE":
"17LIVE" (Ichinana), with a mission of "enriching connections between people," is Japan's largest live streaming platform with over 50 million users worldwide (as of February 2023). Under one sky, across seven continents, it connects live streamers (broadcasters).
"17LIVE" continuously hosts various collaboration projects and events with the aim of allowing both existing live streamers (broadcasters) and those who have never live streamed before to enjoy live streaming.
"mezzo piano junior" is a fashion brand for teens that gained significant attention and swept the trend among elementary and junior high school students in the early 2000s, with its original characters like "Berrie-chan" achieving immense popularity. Furthermore, in response to the unprecedented "Heisei revival boom" of recent times, reissued items have become a hot topic, generating widespread excitement from adults who grew up with "mezzo piano" to the younger generation of the Reiwa era. "17LIVE" decided to hold this event with the hope that this first collaboration with a trending brand leading the Heisei revival boom will create buzz and serve as an opportunity to convey the joy of live streaming to more people.
The "The 'Love' of That Day Lasts a Lifetime. Mezzo Piano Colorful Party" event is open to all "17LIVE" users. During the event period, collaboration gifts (paid) with "mezzo piano" motifs will be available. Users who meet certain conditions and those ranking high will receive exclusive "mezzo piano" digital prizes and official goods such as pouches and nail tips featuring "Berrie-chan." Since the achievement conditions vary depending on the goods, please check the event page within the "17LIVE" app for details.
Please pay attention to this first collaboration event with "mezzo piano," which is leading the Heisei revival boom.
The outline of "The 'Love' of That Day Lasts a Lifetime. Mezzo Piano Colorful Party" is as follows:
■ Event Period: Friday, May 1, 2026, to Friday, May 15, 2026
■ Participation Requirements: "17LIVE" users
■ Main Prizes (partial list) *All are images only
・Digital Prizes (partial)
Mezzo Piano (Berrie-chan) Collaboration Badge, Collaboration Profile Background
・Goods (partial)
Berrie-chan Nail Tips, Face Pouch 【Berrie-chan】
Bangs Clip 【Devilly-chan】, Face Mirror 【Blue Berrie-chan】
Berrie-chan Wish Core Heart Trainer, 【Baby Berrie-chan】Gauze Blanket【Organic】
*Event period and content are subject to change without notice.
*For other prizes and event details, please refer to the event page within the "17LIVE" app.
About "mezzo piano junior":
A brand for glamorous and romantic girls. Offers styles ranging from elegant to trendy casual.
Official Online Shop "NARUMIYA ONLINE": https://www.narumiya-online.jp/shop/brand/20/
Instagram: https://www.instagram.com/mezzopianojunior_official/
How to Watch "17LIVE":
Please download the free "17LIVE" app from below and register an account (*).
App Download: https://17apps.onelink.me/i7CY/17LivePR
*Some paid menus/content are available within the app. Communication charges are the responsibility of the customer.
About "17LIVE":
"17LIVE" (Ichinana), with a mission of "enriching connections between people," is Japan's largest live streaming platform with over 50 million users worldwide (as of February 2023). Under one sky, across seven continents, it connects live streamers (broadcasters).