It's earnings season on the Tokyo Stock Exchange and scores of companies are releasing results for the year ended in March and projections for the year ahead.



The common theme is how new US import tariffs will hit operations.



Japanese automakers are up next. Toyota will announce results on Thursday. Honda and Nissan will follow next Tuesday.



US President Donald Trump imposed an additional 25-percent tariff on automobile imports on April 3.



Firms in other industries facing tariff hikes have begun to incorporate the cost of the levies in forecasts for the fiscal year through next March.



Construction machinery maker Komatsu says it expects operating profit to drop by about 94 billion yen, or over 650 million dollars.



The company attributes this to the higher cost of importing machinery and parts at its US subsidiary.



However, other companies, such as industrial robot manufacturer Fanuc, haven't released forecasts. They say an accurate calculation isn't yet possible.



Japan's automakers play a key role in the economy, so investors will be especially focused on how they will deal with this added levy on their products, and the potential damage to their massive supply chains.