While the North American release crops the Buu saga to 16:9, the Japanese home video release retained the original 4:3 aspect ratio. Furthermore, the episode count is different. The Japanese Kai: The Final Chapters is 69 episodes, while the international cut was edited down further to 58 episodes.
The original DBZ is a classic, but it is flawed. Kai is the refined classic. The Season 1-4 Blu Rays offer professional voice acting, gorgeous Kikuchi score, and a 4:3 transfer that respects the original art. When paired with The Final Chapters , you hold the entire Dragon Ball Z mythos in your hands without a single episode of Goku and Piccolo learning to drive a semi-truck. dragonball z kai complete blu ray top
Originally Kai was released as 8 individual Blu-ray “Parts” (2010–2015). Each has ~20 episodes. They are now rare and expensive. Avoid unless you’re a collector. While the North American release crops the Buu
Here is the definitive ranking of the best Blu Ray releases for collectors looking for the "top" experience. The original DBZ is a classic, but it is flawed
It’s not just a box set; it’s the definitive way to witness the evolution of the greatest Saiyan to ever live.
There is no single "Ultimate Box Set" released by Funimation/ Crunchyroll