Online retailer Amazon Japan K.K. said Wednesday it has raised its shipping rates by up to 50 percent due to rising logistic costs.

The company had charged ¥350 ($3.28) for orders under ¥2,000, but the fee was raised to ¥400 for products shipped to Honshu and Shikoku islands and ¥440 for shipments to Hokkaido, Kyushu, Okinawa and smaller islands.

Express services and deliveries on specified dates were raised by between 10 percent and 50 percent.