Ford Motor Company (F), General Motors Company (GM), Honda Motor Co Ltd (ADR) (HMC), Toyota Motor Corporation (ADR) (TM): Has Japan Created a Day of Reckoning for U.S. Automakers?

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In the past six months, the yen has plunged in value relative to the dollar. Whereas $1 was worth less than 80 yen in late 2011 and throughout most of 2012, the exchange rate has moved by more than 20% since October, so that $1 approximately equals 94 yen.

US Dollar to Japanese Yen Exchange Rate Chart

U.S. Dollar to Japanese Yen Exchange Rate data by YCharts

This devaluation has come about primarily because of a change in government in Japan. Shinzo Abe’s LDP came to power in the December parliamentary elections, and Abe promised to restart economic growth by fighting deflation. Abe has since appointed a new governor of the Bank of Japan, Haruhiko Kuroda, who has promised a more dovish monetary policy. The shifting political winds have led to sharp declines for the yen against every other major currency.

A cheaper yen is a boon to Japanese exporters, such as automakers Toyota Motor Corporation (ADR) (NYSE:TM) and Honda Motor Co Ltd (ADR) (NYSE:HMC). By contrast, American automakers, such as Ford Motor Company (NYSE:F) and General Motors Company (NYSE:GM) could be at risk as their Japanese rivals gain a cost advantage. However, the ultimate impact of the yen’s move on these stocks depends on the strategies adopted by the Japanese automakers.

A white knight?
Japanese automakers have been complaining for some time about cost inflation caused by the strong yen. All of the major Japanese automakers have been moving production overseas in recent years to counteract the strong yen. That said, yen exposure is still high. For example, Toyota — by far the largest of the Japanese automakers — built roughly 3.5 million vehicles in Japan in 2012, more than half of which were exported. As recently as last summer, The Wall Street Journal reported that Japanese automakers were planning to move even more production overseas because they could not profitably export vehicles built in Japan.

The yen’s precipitous decline has made this point moot: the dollar cost of producing a car in Japan (with 100% Japanese components) is now nearly 20% lower than it was last summer. This is good news for all of the Japanese automakers. With lower costs, they can either pocket more profit per vehicle, or they can cut prices in order to gain market share in key regions like the U.S., while boosting export production to meet the additional demand.

However, this does not mean you should go running to buy Toyota Motor Corporation (ADR) (NYSE:TM) today. While yen devaluation lowers production costs for vehicles built in Japan, it also lowers the dollar value of earnings from within Japan. This affects all of the Japanese automakers, but especially Toyota, which has captured nearly half of the Japanese market in recent years.

Moreover, the expiration of certain government tax credits in Japan in late 2012 led to several months of declining auto sales there. Lower sales volumes in Japan could cut significantly into profit for Toyota, Honda Motor Co Ltd (ADR) (NYSE:HMC), Nissan, and other rivals. Toyota, as the dominant player in the Japanese market, would bear the brunt of any slowdown. Lastly, Japanese automakers have seen a significant drop in sales in China due to the fallout from a dispute over several islands last year. While the pace of declines has been leveling off in recent months, it is unclear whether Japanese automakers will ever be able to regain their previous market shares in China.

North American possibilities
In the North American market, the impact of yen devaluation largely depends upon the actions of Japanese automakers. If Toyota, Honda, and Nissan simply pocket the profits from a cheaper yen, devaluation would have no impact on other automakers, such as Ford Motor Company (NYSE:F) and General Motors Company (NYSE:GM). However, there is good reason to believe that the Japanese automakers will aggressively cut prices or increase incentives to gain market share. This is exactly what these companies did in order to regain market share in late 2011, after tsunami-related supply chain problems had constrained sales in the spring and summer.

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