If a fixed due date is assigned to the performance of an obligation, the obligor is liable for delay from the time that due date arrives.
債務の履行について確定期限があるときは、債務者は、その期限の到来した時から遅滞の責任を負う。
If an uncertain due date is assigned to the performance of an obligation, the obligor is liable for delay from the time when the obligor receives the request for performance after the due date arrives or the time when the obligor becomes aware of the arrival of that due date, whichever comes earlier.
債務の履行について不確定期限があるときは、債務者は、その期限の到来した後に履行の請求を受けた時又はその期限の到来したことを知った時のいずれか早い時から遅滞の責任を負う。
If no time limit is assigned to the performance of an obligation, the obligor is liable for delay from the time the obligor receives the request for performance.
債務の履行について期限を定めなかったときは、債務者は、履行の請求を受けた時から遅滞の責任を負う。