A ransel is a big sturdy Japanese back packs that elementary school students must use. The big size ransels holds text books, stationaries and all other goods used in schools. Since students use this bag through out their 6 years in elementary school, it basically represents them.
Since it is depicted in animes and movies, many foreigners know what ransels are.
Traditionally, girls used red and boys used black ransels, but recently there are many colors sold.
For girls, pinks seems to be the popular one, where as black, green, marine blue and brown navy are poplar amongst boys.
Many companies are starting to sell ransels for next spring. These pretty expensive back packs are usually bought by their grandparents, instead of their parents.
AEON, the highest ransel selling mall is aiming to sell about 300 thousand ransels. It retails from 68,000 yen to 88,000 yen. They have an interesting service where customers (in this case, grandparents) who bought the product can take pictures with their grandchildren.
The second highest selling compay, Itoh Yokado aims to sell 100,000 ransels.
On the other hand affordable brand Nitori is selling ransels for 29000 yen.
Of course, high end department stores like Isetan, Mitsukoshi, and Takashimaya are also selling them too.
Foreigners and tourists, especially from China buys ransels for souvenirs. It is also popular in the states and even sold in airports.