NOTIFICATION DEVICE AND NOTIFICATION METHOD

With reference to a message table associating a plurality of messages to be notified to a driver of a vehicle with a first condition, a second condition, last notification time of the message, and renotification requirement, a notification device selects messages associated with an identified first condition corresponding to a situation of surroundings of a vehicle or a state of a driver, selects, from among the messages associated with the identified first condition, messages associated with an identified second condition corresponding to a state of the driver, specifies, from among the messages associated with the identified second condition, a message without a record of last notification time or a message with a record of last notification time and with a renotification requirement requiring a renotification, and notifies the specified message to the driver through an output device.