Frequently asked questions


What is CVC/CVV?

CVC is a three-digit or four-digit numeric code usually printed on the back of a credit card.
Some card companies may call this code CVV.

How is clear weather rate data calculated?

  • It is based on the previous year’s data from the Japan Meteorological Agency.
  • If the measurement point is not near, data is calculated using another point (measurement point) no more than 50 km away.
  • Measurement points may be located in towns and urban areas, and the clear weather rate in the mountains tends to be lower than this.
  • The clear weather rate changes every year, depending on climatic conditions.Please use it as a guide only.