Thanks to everyone for the great information! I will certainly follow the advice of seeking out someone who is close to the situation. I have a good rapport with one of the non-family members in the office there and will ask her for some insight on paying our respects and the other things associated with this event.

We did hear from one of the family members on Friday and they expressed their appreciation for the card we sent and the flowers we had a mutual associate over there arrange for the service. We were sent a photo taken at the funeral home and I noticed that all the flower arrangements were identical, with a wooden sign noting the contributor of each, which I assume is standard practice. Someone from my office will be in Japan this week on business and will meet with the family.

There are happier ways to learn more about Japanese culture, but this has been an interesting introduction to something common to all cultures. Thanks again for all the help.