This value includes not only the breakdown of factory equipment due to lightning strikes, but also secondary damage such as work stoppages. Most of these are caused by induced lightning.
The annual damage caused by lightning is estimated at 100-200 billion yen. (IEEJ Technical Report No. 902: 2002)
In recent years, electrical products run on less energy, so even a small amount of abnormal voltage tends to cause malfunctions and breakdowns. In addition, the probability of equipment damage due to lightning also increases as the number of lightning entry paths increases, such as in computers connected to power and communication lines.
In order to prevent such damage caused by induced lightning, it is effective to install a device called a lightning arrester (hirai-ki).