The last time Sony topped the console sales list was in fiscal 2005.
Sony's PlayStation 4 has emerged as the bestselling video game console. But demand for Nintendo's Wii U has lagged far behind the original Wii, which was the most popular hardware of the last generation.
Sony, Nintendo and their US rival Microsoft will all be announcing new titles this week to coincide with the E3 video games expo in Los Angeles.
The Nikkei's report followed Nintendo's announcement that it was closing its European headquarters in Germany.