Japan's second biggest automaker, Nissan has rounded out a record year in car sales by returning to 380 million US dollars quarterly profit in the fourth quarter. The result comes in amid worries over the potential impact of the recent disasters.

Nissan's Chief Executive Carlos Ghosn said production at Nissan plants worldwide will be back at pre-disaster levels by October, after which the company will make up for lost production.

Nissan shares rose 1.4 percent to 795 yen in Tokyo trading, shortly before earnings were announced.

However, Nissan and other Japanese automakers still face uncertainties due to the damage from Japan's earthquake, tsunami and nuclear crises.

Ghosn said the company is preparing for further electricity shortages' especially in summer months when demand peaks. Nissan will conserve energy and is considering adding nighttime production and in-house generation.