日射

1. Origins, structure, and basic meaning

• Structure: 日射, read にっしゃ, denotes sunlight or solar radiation reaching a surface and its measured amount.
• Basic usage: It refers to strong sunlight blocked by an awning and the amount of solar exposure measured on a roof.

2. Common pitfalls and similar expressions

• Sunlight and measured solar exposure
  • It can denote not only visible sunlight but also the measured solar energy reaching a surface.