for personal computers, will grow further," he predicted.

Supporting this growth is the spread of third-generation mobile phones that offer high-speed data transmission, as well as flat fees for unlimited Internet use.

"Monthly sales through mobile phones in October this year was four times higher than the year before. Sales especially began to grow rapidly in the second half of 2004," said an Amazon Japan official.

People who place orders via personal computers are mostly in their late 20s to late 40s, but 60 percent of purchasers using mobile phones are in their teens and 20s, he said.