Where are the Prius battery are made in?

The Prius' battery is made in Japan in by Panasonic EV Energy, a joint venture company partially owned by Panasonic with Toyota having the majority.

Company Name: Panasonic EV Energy Co., Ltd.

Head Quarters: 20 Okasaki, Kosai, Shizuoka, 431-0422 Japan

Omori Factory: 20 Okasaki, Kosai, Shizuoka, 431-0422 Japan

Sasaijuku Factory: 555 Sakaijuku, Kosai, Shizuoka, 431-0452 Japan

Description of Business: Development, Manufacturing and Sales of Nickel metal-hydride and Lithium ion rechargeable batteries and Battery management systems for HEVs and PEVs.

A third factory will be opening up in the Taiwa-cho area of Japan.

You can read about the environmental impact of the Prius by going to http://www.toyota.co.jp/ and searching for Prius environmental report

At least they are polluting china instead of driving a regular car and polluting our air.

china. yes, they are polluting the water and air heavily. add to that the fact that nickel mining is one of the most polluting on earth, that it gets shipped all over the world before being made into a car and 'real' pollution is HIGHER on a Prius than on most midsized and smaller cars. one study rated it higher than a hummer actually, although after reading the study he took some pretty wild liberties with his numbers.