Correct. I don't know of another one and i think i have seen them all (i also have a quiz online btw).
There are a few more unique things about "Akahige" (or "Red Beard") - it is over 3 hours long and has an on-tape intermission, it is the last film in which Kurosawa worked with the great Toshiro Mifune and it is his last B&W film.
