NEW YORK -- Asia’s peak shipping season kicked off with pilot strikes, rate increases and reports of tight space conditions in some areas, particularly in regions that route cargo through transit hubs.

A strike by Polar Air Cargo pilots is expected to last through the peak season and cut freighter capacity out of Shanghai, Hong Kong, Japan and Korea, said Trans Global Logistics USA, a major freight forwarder. Japan Airlines and Asiana immediately imposed rate increases after the strike was announced Sept. 16. The full impact of the strike is expected to hit toward the end of the month, TGL said.

Carriers are also hiking fuel surcharges by as much as 67 cents per kilogram.