Siero appears as a featured guest on ACE COOL's third album Haigamine, released September 16, 2026, and is attached to a music video for LEX's 'Sense' set to arrive on YouTube in 2027.
Siero's recent coverage is as a guest, not a lead. ACE COOL released his third album, Haigamine, on Wednesday, September 16, about two years after his previous album. The nine-track record is named after Mt. Haigamine, which overlooks ACE COOL's hometown of Kure, Hiroshima Prefecture. Siero is one of the guests on it, alongside Jinmenusagi, Bonbero, BFN TOKYOTRILL, and JC.
That album credit follows a separate appearance from earlier in the summer's news cycle. LEX will release the music video for 'Sense feat. Siero' on YouTube on May 1, 2027, his birthday, roughly a year after the album SPEEDSTAR dropped. A teaser is already available. The track is the lead single from that album, which features eight new songs and a pre-released track.
The two stories establish the same pattern: Siero is a featured voice on other artists' records, with no solo project named in the coverage. The Haigamine credit places Siero in a lineup drawn largely from the scene around Kure, while the LEX video extends a track from an album that arrived a year earlier. Neither story gives a Siero release of his own, a label, or a date beyond the video.
Synthesized by Yomimono from the cited Yomimono stories below, each itself sourced, then editorially reviewed. Every fact links the story it came from.
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Rapper ACE COOL released his third album, Haigamine, on Wednesday, September 16, about two years after his previous album. The nine-track record is named after Mt. Haigamine, which overlooks his hometown of Kure, Hiroshima Prefecture, and is the first to use a place name from Kure in its title. Guests include Jinmenusagi, Bonbero, Siero, BFN TOKYOTRILL, and JC.
ABEMA's rapper discovery audition RAPSTAR2026 has drawn 12,953 applicants, the highest ever, nearly double last year's 6,780. The 2026 season premieres October 10 on ABEMA, with a 10 million yen prize, up from 3 million. Seven producers provided beats for application videos.
Rapper LEX will release the music video for 'Sense feat. Siero' on YouTube on May 1, 2027, his birthday, approximately one year after the album 'SPEEDSTAR' dropped. A teaser is already available. The track is the lead single from the album, which features eight new songs and a pre-released track. LEX, who emerged from SoundCloud and released his first album at 16, is scheduled for a Toyota Arena show in October 2026.