Yes, we have a special vacation season locally called "Golden Week" at the beginning of May. With 4 public holidays falling close together on the calendar, most of Japanese manufacturers make them up to a non-business week, by rearranging working schedule around that period.
We are going to take a break, too, but rather irregularly (ships do not wait for us !). So, please carefully check our working calendar if you or your ships may call us about the Golden Week.