When Does the Comic-Book "The Sands of Kurobe" (1967) Take Place?
"Kurobe no Taiyō" (literally "The Sun of Kurobe" or "The Sun in Kurobe") is a historical fiction comic-book written by Masamichi Yokoyama [adapting "Kurobe no Taiyō" (1964) by Shōji Kimoto] that first released December 23rd, 1967 (serialized starting in "Weekly Shonen Magazine" 1968 #1). So when is "The Sands of Kurobe" set?
It takes place in the year:
We know this because it depicts the construction of the unique real-world Kurobe Dam, which started in July of 1956 AD and was competed in June of 1963 AD. So it must take place between July of 1956 AD and June of 1963 AD.

1950s AD
We know this because it depicts the construction of the unique real-world Kurobe Dam, which started in July of 1956 AD and was competed in June of 1963 AD. So it must take place between July of 1956 AD and June of 1963 AD.