The Windows 10-based Yamada Denki EveryPhone is the thinnest Windows smartphone ever
Thinness aside, the Yamada Denki EveryPhone is a rather modest device. Powered by a quad-core Qualcomm Snapdragon 410 processor, the handset sports a 5.5-inch display with 720 x 1280 pixels, and has two color version: black and white. The EveryPhone also features LTE connectivity, a 13 MP rear camera with dual LED flash, 5 MP font-facing camera, 2 GB of RAM, 32 GB of expandable internal memory, and a 2600 mAh battery.
In Japan, the EveryPhone costs 39,800 JPY, which is about $324 - that's more than what you'd expect to pay for a smartphone of this caliber in other parts of the world.
source: Yamada Denki (in Japanese) via Blog of Mobile, WM Power User, Cross-coretech