in answer to the question you asked about the 2-disc RODAN/WAR OF THE GARGANTUAS, I just checked out the discs and here's how it breaks down:
- RODAN is full screen in both the Japanese and English versions. I'm not certain, but I don't think Toho really went widescreen for the monster epics until either KING KONG VERSUS GODZILLA (1962) or GODZILLA VERSUS MOTHRA (1964).
-WAR OF THE GARGANTUAS is in glorious widescreen in both the original and the English versions.
So even though Amazon neglects to list the widescreen feature in the item's specs, you can always TRUST YER BUNCHE!