Japan's biggest consumer electronics and IT trade show kicked off Tuesday in Chiba Prefecture with major firms showing upcoming products and giving an insight into their current research and development. Technologies on display ranged from 4K televisions and fuel-cell and hydrogen technology to wearable devices and robots.

4K, an ultra-high-definition video standard, is already a familiar sight at major electronics exhibitions worldwide and this week's Combined Exhibition of Advanced Technologies, better known as CEATEC, is no exception.

The event, held at the Makuhari Messe center, features 547 exhibitors. A total of 150 are foreign companies.