کی‌دی‌کی

Also known as Kawakita Denki Kigyosha, Kawakita Electric Company, Nippon Electric Industry Co. Ltd., Panasonic Ecology Systems Co., Ltd.

Kawakita Denki Kigyosha (Japanese for "Kawakita Electric Company"; commonly known as KDK), is the brand name used by Matsushita Ecology Systems Co. to manufacture the group's ventilating products. Before becoming part of Matsushita Electric, KDK was a separate company not affiliated with Matsushita Electric Industrial Co. Ltd. KDK was registered as a trademark in 1912 but originated in 1909 as Nippon Electric Industry Co. Ltd.