The graphic violence depicted on them must have been as shocking to people at that time as the fact that Japanese movie ticket prices haven't change at all since 1978 is to us now!
While Dawn of the Dead was just called Zombie here as it was in Europe, Day of the Dead got a much cooler name: Food for the Dead! The catch lines on these were beefed up for the Japanese market, too. The one on Dawn reads "Give us meat, YOUNG meat!" and Day says "The living have become prey to be hunted down and feasted upon by the returned dead."
More to come soon!