Buiar VTuber Radio NHK
Illustration: WhyTrend

On May 16, 2026, NHK AM radio's Buiar! VTuber Music Radio aired its 132nd episode as a special collaboration with Netflix's original anime film Cosmic Princess Kaguya. The show, hosted by Hoshimachi Suisei, is notable because it gives VTuber music a regular slot inside Japan's public broadcasting system.

For non-Japanese readers, the useful context is that Buiar is an NHK radio program hosted by Hoshimachi Suisei, while Cosmic Princess Kaguya is a Netflix-linked anime film project, so the episode bridged public broadcasting, VTuber fandom, and character-anime promotion in one live event.

The emotional centerpiece was a surprise letter read on air. It revealed that the song Reply was framed as both a response to Kaguya and a tribute to a deceased father, information that had not been widely explained to casual listeners before the broadcast. The episode also gave Kaguya's first original song, I Like Myself, its radio debut.

Online reaction centered on the feeling that a national radio program had delivered official character-lore material in real time. Hoshimachi Suisei fans, anime-film viewers, and listeners following the radio archive all had a reason to share the same moment, which is why the topic moved beyond a normal guest announcement.

What to watch next: Episode 133 airs on May 23, 2026 at 9:05 PM JST, with Nobuyuki Sakuma scheduled as guest. The remaining archive window for Episode 132 is also important because late listeners can still catch the reveal before it expires.