Nescafé

After World War II、many Amecrian Soldiers spread Instant coffee like Nescafe、and it was included in Care packages delivered to civilian populations around in Western Europe, Japan right after WWII and so on.
But in Japn, instant coffee is not spread soon, because of limitation of import of coffee regulation.

After that, in the 1960s, when restrictions on imports of instant coffee were lifted in Japan, instant coffee became popular.

By the time the U.S. entered World War II in 1941, Nescafé was already in the emergency rations of every departing U.S. soldier , so the hundreds of thousands of American soldiers who occupied Japan from 1945-1952 would have been familiar with it and likely brought it with them.
However, coffee didn't immediately become popular in Japan. During World War II, the Japanese government established a ban on coffee imports that lasted until 1950 , which limited its availability during the early occupation period.

Nescafé's introduction significantly increased coffee consumption and created new coffee fans, particularly during and after World War II.
U.S. per capita coffee consumption actually peaked in 1946 at 46.4 gallons per person - right after the war when Nescafé had become widely popular. During World War II, Nescafé's sales volumes doubled, showing rapid growth in popularity.

Nestlé chemist Dr. Max Morgenthaler worked for seven years to develop a soluble instant coffee that would preserve coffee's natural flavor and aroma. 
The challenge was to create a product that could be easily prepared by simply adding water while maintaining the quality of real coffee.
On April 1, 1938, Nescafé was officially launched in Switzerland.