How to say "ken" in Japanese

• 視界しかいCommon
  nounCovers 'ken' meaning the range of what one can see — one's field of vision. A common word for visibility or view, used when talking about how far or how well a person can see.
  彼かれらはついに視界しかいから消きえた。↗

  They went out of sight at last.
• 間けん
  nounThis is the Japanese unit of length, 6 shaku (about 1.8 m), not the English 'ken' meaning range of sight. A less common word; use it only when the measurement is meant.

Use 視界 for the English 'ken' meaning the range of what one can see, and 間 only for the Japanese unit of length 'ken' (about 1.8 m); the two senses never overlap.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 視界しかいfield of vision
• 間けんken (6 shaku, approx. 1.818 m)