Strict environmental and fuel regulations are enforced in advanced countries, and hybrid cars are spread and electric vehicles began to be sold. However, new sales are mostly for gasoline or diesel engine cars worldwide, and how to improve fuel efficiency is a large issue. Under this environment, idling stop system is being paid attention as a measure to increase fuel efficiency.

The global sales quantity of idling stop system vehicles was approximately 904 thousand units in 2009. By region, Europe accounts for 97.5 percent selling approximately 881 thousand units, followed by Japan that sold approximately 18 thousand units.

In Europe a gradual enforcement of CO2 emission regulation will start in 2012 and each country is shifting to CO2-based auto tax system. Therefore, environmental friendly vehicles are expected to be produced and sold aggressively. Furthermore, the barrier is low in this region as many use a manual transmission vehicle and do not require strict engine restart timing. Moreover, oil pressure system is unnecessary because of clutch engagement, and thus idling stop system can be implemented at low cost. It is anticipated that the ratio of idling stop system vehicles will exceed 40 percent with sales quantity of approximately 8,840 thousand units in 2015.

Although the 2009 sales quantity of idling stop system vehicles in Japan is only 18 thousand units, the 2015 sales quantity is expected to reach approximately 940 thousand units due to the plan to mount idling stop system on light cars and small cars to which hybrid system is difficult to apply.

With the expansion mainly in Europe and Japan, the world sales quantity of idling stop system vehicles is forecast to grow to approximately 10,430 thousand units in 2015.

Among five major system sectors in the idling stop system market, engine restart system represents a large portion. The market size of engine restart system is approximately 10,230 million yen in 2009, and it is expected to be approximately 90,780 million yen in 2015, growing at an annual rate of 45.1 percent.

Power management system is expected to make the most rapid progress among the major configuring systems as Li-ion battery and capacitor sub power source systems with highly efficient and large capacity power regeneration function are highly anticipated to be used with idling stop system.

The idling stop system market size (the total sum of major configuring systems based on manufacturer shipment value) is estimated at approximately 13,680 million yen in 2009. After 2010 each manufacturer would lower the costs and average unit price of systems may decrease. However, the number of idling stop system vehicles will sharply increase and the market will grow largely in value.

After 2012 next generation idling stop system with highly efficient power regeneration will appear and average unit price is anticipated to rise. The 2015 market size of idling stop system is forecast to be approximately 170,870 million yen with an annual growth rate of 51.9 percent.