Reddit reviews Case Closed - The Investigation is Afoot (Season 1 Vol. 1)
We found 1 Reddit comments about Case Closed - The Investigation is Afoot (Season 1 Vol. 1). Here are the top ones, ranked by their Reddit score.
It's very much a bootleg. Like others have said, no Season 6 (which would finish the actual Season 5) was ever made. Although if you search Case Closed Season 6 there's listings for something called Old Grudges, but all the listings show a different DVD. For instance
https://www.amazon.ca/Case-Closed-Grudges-Season-Vol/dp/B000AC7OKC
https://jet.com/product/Case-Closed-Season-6-V01-Old-Grudges/e8a4b829262545ba9bbb7fe6a0cd1f54
But they never actually dubbed any episodes past what's available or they would have released them.