While this title is probably read as "riyuu" 90% of the time, their Spotify romanization has this as "wake" so I'm changing romaji to this reading instead
If they fit that description, then yes, by how we organize bands they would be. Also, the emphasis is on individual members, not where the band conducts activities.
They are not currently available digitally (and honestly, they probably won't ever be), so your best bet is to check out second-hand stores: https://puresound.co.jp/user_data/sp_artist_product.php?aid=lilith&psd=99&mt=1&perPage=20&sk=1&zk=1&kwdstr=&pd1=1&pd2=2&pd3=3
Tried to find the contents of two of these DVDs, plus the 3rd best-of album, but their old OHP and various CD shops just list this as a 5-disc box set without any further info :/