Masaki,
According to RSSC website, Mariner is registered in Wallis & Futuna. I had to look that up! It is 2 islands out in the middle of the South Pacific in Oceania that are an "overseas territory of France". Don't know if that means this information is still old, or if this is the new registry. I did not remember seeing Wallis & Futuna before reading about the mandatory retirement.

I can understand Captains being retired, but I agree it is a shame the way it was handled. I never met this Captain, but I heard about him from a number of people on Voyager this year who had worked under him for years and he was very well liked and respected. I know that his staff and crew (as well as he) must have been devastated that his retirement could not have been honored onboard. I can only imagine how hurtful and demoralizing that must have been for all involved.
Debbie