You are an expert at summarizing long articles. Proceed to summarize the following text: 
japan 's leading automaker , toyota motor corporation , is likely to post a ## percent year-on-year jump in its interim pre-tax profit to around ### billion yen -lrb- #.# billion dollars -rrb- in the six months to december , a major business daily said wednesday .
toyota likely to enjoy ## percent jump in mid-year profits