On the day the client makes the notarized will, the notary officer will give the client three copies of the notarized will.
The first is “Original”, the second is “Certified True Copy”, and the third is “Certified Copy”.
The “Original” is literally the original of the notarized will.
The “Certified True Copy” is a copy of the original, and has the same legal validity as the original.
The “Certified Copy” is also a copy of the original, but does not have a legal validity.

So, who keeps the Original, the Certified True Copy and the Certified Copy, and where?
The Original is kept at the notary office for over 100 years. It is kept safely, being digitized so that it will not be lost in an event of an earthquake or fire.
The Certified True Copy is generally kept by the will executor. Since the will executor is responsible for executing the will promptly after the client (will maker)'s death, it is desirable that the executor keeps the valid Certified True Copy on hand. If the Certified True Copy is lost, the client can request a reissue at the notary office where the notarized will was made.
The Certified Copy is just a copy and the client generally keeps it, so the client can present his/her family the contents of the will if necessary.

Three copies of a notarized will are made, and each is kept by an appropriate person. In addition, the Original is digitized and kept at the notary office for a long period of time, and if the Certified True Copy is lost, a new Certified True Copy can be issued. Because of this storage system, a notarized will is more reliable than a handwritten will.