Is it possible for the utilization rate of the set budget to exceed 100% (resulting in a budget overrun)?

Unless there are sudden changes at the end of the month (such as budget changes or setting adjustments), there is a more than 99.99% probability that it will stay within the budget. However, it is not 100% guaranteed. (Considering that the platform may use up to twice the daily budget, we will adjust to stay within the budget.)

Additionally, if you have set a very small budget, such as a few thousand yen per month, even if Shirofune sets the budget or bid amount to the minimum value that can be set on the advertising platform, the delivery pace may exceed the set budget. (In such cases, a status of "Cannot Lower Budget" is usually displayed on the Shirofune management screen.)

If it absolutely must not be exceeded, it is recommended to set it with some leeway, or if you have an account with the platform, you can use the platform's features to set a cap.