The ability to find lyrics on lyric sites would be a reasonable proxy for sufficient popularity, I’d imagine. On a semi-related note, when talking about large

The ability to find lyrics on lyric sites would be a reasonable proxy for sufficient popularity, I’d imagine. On a semi-related note, when talking about large genre-specific corpuses, https://vgmdb.net https://vgmdb.net has a fascinating scope definition across all things game and animation adjacent, including both the massive doujin (fan-made) music scene and the full discographies of many j-pop artists and composers, all annotated by franchise adjacency with (often) full staff credits: https://vgmdb.net/forums/showthread.php?t=22321 https://vgmdb.net/forums/showthread.php?t=22321 It’s a fascinating corpus and one I’d love to analyze deeply one day.