本題

「本題」 is a song by 鏡介, a Japanese-language AI music act, released on Spotify and the other streaming services as a single on 6 August 2026, with the act's own name 鏡介studio on the ℗ line. The track runs about 2 minutes 13 seconds, and an official music video went up on the act's YouTube channel on 2026-08-06. Its title means "the main subject"; the single also carries a Japanese-style ("和風") edit of the song, and the video description speaks of a fitting end. The upload credits 鏡介 for the lyrics, the music video and the direction, and Suno AI for both the music and the vocal, with the artwork and moving images made in Midjourney. By 2026-10-02 the video had about 18,007 views on YouTube.