Sounds like a real family treasure , especially with the letter. Not that you would want to part with the flag , but I think it is interesting their is a group that tries to return flags to the original Japanese owner's family when there is enough info to do that. I think we have just had that happen once since people started posting flags here. My dad was based on a sub during WWII stationed in Hawaii. He used to joke about the Marines there making fake flags and making a killing for money , cigarettes and booze for guys to take home. Some posted here in the past had real interesting info on them with good details. I always like reading info on them when our members here help translate them.