It is this: Akira Kurosawa - 4 Samurai Classics (Seven Samurai / The Hidden Fortress / Yojimbo / Sanjuro) - Criterion Collection
OK. This is when my incessant sending up of pseudo-cinephiles backfires. I really want this, but cannot say why, otherwise I'll be at risk of sounding every bit as pretentious. So I'll just show you a picture.
Looks nice, doesn't it? I haven't seen The Hidden Fortress.