I am curious about which documentaries exist out there that were "official" or approved/authorized by Studio Ghibli that have been released onto either DVD or Blu-ray and have English subtitles.

By this I mean, it's not just some third-party special or documentary overview about Ghibli... it actually interviews Ghibli employees and includes on-screen commentaries, tours the studio, and offers behind-the-scenes access. Full-access type documentaries.

So far I own just three:

The One Who Painted Totoro's Forest
The Kingdom of Dreams and Madness
Isao Takahata and His Tale of The Princess Kaguya



Are there others out there I can pick up?

The region encoding of the DVD or Blu-ray does not matter, my player is region-free. But I require English subtitles or dubbing.

Thank you!

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The Disney DVD for "Nausicaa of the Valley of the Wind" has a lovely piece about the history of the studio that was originally shown on Japanese television. Not sure what it's called, however.