口くちひげ

• 口くちひげUsage41%

  Common mixed kanji-kana spelling; the ひげ part is often written in kana.

• 口くち髭ひげUsage56%

  Full kanji spelling; 髭 is a general kanji for facial hair.

• 口くち鬚ひげUsage1%
  rarely-used kanji form

  Rare kanji form; 鬚 is an uncommon variant for facial hair.

• くちひげUsage1%
• 口くち髯ひげUsage1%
  rarely-used kanji form

  Rare kanji form; 髯 specifically refers to a beard or whiskers.

Compound of 口 (kuchi, 'mouth') and ひげ (hige, 'facial hair'). The reading くちひげ is a straightforward combination.