ー

Glyph origin
Said to be from the right side of.

Combining form

 * 1) The long-vowel mark, which marks a long vowel in katakana (and less commonly in hiragana) when placed after a syllable.

Usage notes

 * This mark appears as a horizontal line in horizontal writing and as a vertical line in vertical writing.
 * when written vertically appears as:
 * タクシー
 * The Japanese names are, or