Right on the time frame, Andy, but not on the brand name. But you sure know your razors I will post more when I get it in hand
Assuming it is Japanese I can only think of 2 other razor manufacturers that made TTO style razors around this time, one I doubt this is made by was Feather besides the Popular which I don't know if it was made in the 60s but it definitely was by 70s, they also made another TTO which was a knockoff of the Gillette slim twist knack style razors. The other company is called Shiseido which made razors that similar to but wouldn't be mistaken for razors like the Gillette flare tip Rocket.
The rest of the Japanese manufacturers I know of were all making Gillette 3pc Tech knock offs with varying handle designs during the 60s.