Canada has no age limit. Pilots can fly in country as long as they can hold a medical, however they cannot fly international to a country if they are over the age limit for that country.

Japan has gone to 67. Again, the limiting factor is international, a 66 year old pilot working for a Japanese carrier can't fly to the US, and so forth.

The FAA does not change the age rule, congress does. Congress must change USC 49 in order for the FAA to change the 14 CFR regulation. See 49 U.S. Code § 44729. Age standards for pilots.