The Nikkei said that Apple expects shipments of 80 million units for the new phones, compared to the 100 million units it had placed orders for last year.
Apple was not immediately available for comment when contacted by CNBC.
Apple’s latest smartphone, the iPhone X, is the first to be equipped with an organic light-emitting diode (OLED) screen. OLED screens make images appear brighter and sharper than the light-crystal display (LCD) panels Apple had previously used.
It is also the most expensive phone to have ever been released by the company, with a $999 price tag.