The First Press Limited Edition physical box set, often priced around 55,000 yen (roughly $350–$570 USD depending on the retailer), includes luxury bonuses:
For the purist, buying the physical CD box set (via CDJapan or Amazon JP) and ripping it to your hard drive is the gold standard. This gives you a lossless copy for your Plex server or smartphone. For a 20-disc box set, this yields roughly 3GB of MP3 (320kbps) or 10GB of FLAC. Kamen Rider 50th Anniversary Song Best Box Download
Released in 2021 to coincide with the milestone anniversary ( 50th ), the is not a simple "greatest hits" CD. It is a comprehensive historical archive. The First Press Limited Edition physical box set,
Available worldwide (excluding Japan-only region locks removed for this release) on: often priced around 55