TOKYO  Toyota Motor, the Japanese auto giant, said Monday that it expected its first operating loss in 70 years, underscoring how the economic crisis was spreading across the global auto industry.

On Monday, Toyota said it expected an operating loss in its auto operations of 150 billion yen, or $1.7 billion, for the fiscal year ending March 31. That would be the company’s first annual operating loss since 1938, a year after the company was founded, and a huge reversal from the 2.3 trillion yen, or $28 billion, in operating profit earned last year.

Analysts said Toyota’s downward revision, its second in two months, showed that the worst financial crisis since the Depression was threatening not just the Big Three but also even relatively healthy automakers in Japan, South Korea and Europe. Many other companies will also soon be reporting losses.

Worse, analysts said that they expected next year to be even more painful, amid forecasts that the global economy would continue to slide until at least the summer. This could cause a significant shakeout, driving smaller and weaker companies into the arms of a smaller number of bigger, richer players.