Girl group LIGHTSUM is gearing up for a swift comeback as it looks to strengthen its foothold in Japan’s music market. Its agency, Cube Entertainment, announced that LIGHTSUM will release a new Japanese digital single, “MerryKiss” (メリキス), on Dec. 6.
![LIGHTSUM ‘MerryKiss’ [Provided by Cube Entertainment. Not for resale or database use]](https://cdn.www.cineplay.co.kr/w900/q75/article-images/2026-11-02/0a098e12-6ed7-42de-9ad0-3fea44b97a8e.jpg)
Cupids win over Japan with a winter-season song, poised for another hit
The new release comes just two months after the group put out its Japanese debut album, “Re:idol,” in September. LIGHTSUM previously drew strong interest from Japanese fans with its signature bright and cute concept. Building on the successful launch of its debut album, the group plans to carry its momentum forward by releasing new music without a break.
The upcoming “MerryKiss” is a lovely holiday-season song that perfectly suits the festive year-end mood. LIGHTSUM will bring the warmth and excitement of winter to life through its distinctive vocals and performance. The music industry is watching to see how the winter song fares as it seeks to win over not only global K-pop fans but also Japanese listeners.

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