Toyota Motor Corp. has delayed the release of its annual production and sales plan until next month to study how recently decided tax reforms for fiscal 2014 will impact automobile taxes, industry sources said Saturday.

The automaker has also rescheduled to January its presentation of the plan to parts makers, dealerships and other business partners, the sources said.

The plan is highly likely to project that group production and sales, including those by affiliates Daihatsu Motor Co. and Hino Motors Ltd., will both top 10 million units.

In its plan for 2013, revised in August, Toyota predicted global group sales of 9.96 million units and global production of 10.12 million units, both up 2 percent from the year before.

Reform of vehicle taxes was a key component of the tax reform policies for the year starting in April, which Prime Minister Shinzo Abe's ruling bloc adopted Thursday.