EDIT Horizontal Bar The longest line encoded in Unicode.

 jsw  de 

EDIT Usages Used as a quotation dash.

Used in some Japanese-Japanese dictionaries (i.e. Yahoo!辞書) to denote the referenced keyword in an example sentence. Usually accompanied by the Katakana Center Dot ・

Not to be confused with:
Katakana-Hiragana Prolonged Sound Mark ー
CJK Ideograph, First 一

 akrodha  : :  de