Letters From Iwo Jima is unique for a number of reasons. First, it’s an American movie that is almost entirely in Japanese.
It is also the companion piece to Flags Of Our Fathers, which is the story of the Battle Of Iwo Jima from the America perspective while Letters From Io Jima is from the Japanese side.
Letters From Iwo Jima is definitely the better of the two, though both are excellent.
Sadly, neither movie did well at the box office, but no matter, just the ambitiousness and uniqueness of the two movies is worth seeking them out.