Fuji and Sakura had many many labs that processed this film all over the far east. A roll of Kodachrome in 1959 was $10 processing included, and a roll of the Japanese variety was about 1/2 that or less. That was a lot of money back then.
According the BLS inflation calculator, that $10 in 1959 is $78.23 today.
And people think that film is expensive now! Wow, I'd never shoot color at that price.