Hungry? Just grab a cup of instant noodles and pour hot water into it. After waiting three minutes, the ramen is ready to eat.

This September marks the 45th anniversary of Cup Noodles, the "magic" instant food that has had a dramatic impact on food culture.

Since its debut in 1971, more than 40 billion packages of the popular instant ramen had been sold as of May, according to Cup Noodles manufacturer Nissin Food Products Co. The product is now sold in more than 80 countries, with sales outside Japan occupying roughly 70 percent of the total in 2015 in terms of volume.