Nissan expects the congestion to ease by April.
The delays highlight the challenges Nissan and its French partner Renault face as they ready eight battery-powered models for market by 2014 — the biggest bet on the new technology by any carmaker.
In Britain, which has about 500 orders for the Leaf, the first shipment of 67 cars arrived on schedule from Japan this week.
Nissan and Renault are investing €4 billion ($5.4 billion) in electric vehicles, and building factories to supply them with lithium-ion batteries in France, Portugal, the UK, the U.S. and Japan.
The last of these, operated by Nissan’s joint venture with NEC, is the only one operating so far.