Toshiba has officially launched early this week the “world’s thinnest and lightest tablet”–the Toshiba REGZA AT700–for the Japanese market.

The tablet is due for release in Japan in mid-December. Toshiba made the official announcement of the 10.1-inch tablet at the Combined Exhibition of Advanced Technologies (CEATEC) trade show held in Tokyo, Japan.

The Toshiba REGZA AT700’s attractive features include its depth/thickness of 7.7 millimeters and its weight of 558 grams. The tablet is much thinner than the Samsung Galaxy Tab 10.1 and is slightly lighter, too.

The REGZA AT700 is powered by Android 3.2 Honeycomb and a dual-core Texas Instruments OMAP 4430 processor (1.2 GHz). It also comes with 1 GB of RAM, 32 GB of internal storage, 5-megapixel primary camera, and 2-megapixel secondary camera.  Battery life is expected to last up to about 7 hours on full charge.

And, just like its thicker 10.1-inch ancestor, the Toshiba THRiVE, the Toshiba REGZA AT700 will come with peripheral ports such as those on regular laptops (i.e., micro HDMI, card reader, and MicroUSB ports). Bluetooth, Wi-Fi, and GPS connectivity is also baked in.

While the REGZA AT700 is Japan-bound, the U.S. and Europe may have their share of a similarly spec’d Toshiba tablet in the form of the Toshiba AT200, which the company officially announced at the Internationale Funkausstellung (IFA) 2011 in Berlin last month.

No official announcement of the price for the tablets has been revealed yet. Toshiba has also not yet revealed its schedule for releasing the Toshiba REGZA AT700 or the Toshiba AT200 in the U.S. and Europe–although Toshiba will be making a lot of folks happy if it released both tablets at the same time in mid-December, preferably earlier.

If Toshiba prices this tablet at the same fire sale price as the HP TouchPad (i.e, US$100), I’ll rush in line to buy one. Will you?