一目瞭然

1. Origins, structure, and basic meaning

• Structure: 一目瞭然 is read as いちもくりょうぜん and is an idiomatic predicative expression meaning that a difference or situation is clear from a single glance.
• Basic usage: Use it as in 違いは一目瞭然だ for tabulated results and 区域が一目瞭然である for a color-coded map.

2. Common pitfalls and similar expressions

• Presentation makes comparison easy
  • Tables and color coding allow the relevant difference or danger zone to be identified visually without extended explanation.
• Not merely fast
  • The emphasis is visual obviousness at a glance, not simply that understanding happens quickly in time.