I found an interesting article about Digital Inheritance in a magazine named KINZAI Financial Plan (May 2020).
The authors warned that we should recognize the importance of the digital assets and prepare for the future– after death.
I checked how this problem is being addressed in the U.S.
https://www.nolo.com/legal-encyclopedia/ufadaa.html (Page1)
According to this webpage, there is an act to address this problem and the first act was called Uniform Fiduciary Access to Digital Access Act (UFADAA). Now the act was revised and called RUFADAA (Revised UFADAA).
This chart explains the differences between UFDAA and RUFADAA.
https://www.uniformlaws.org/HigherLogic/System/DownloadDocumentFile.ashx?DocumentFileKey=a45a0fc6-4cb4-0b25-a4cf-1792f1852355&forceDialog=0 (Document1)
The author of the Page1 advised, ‘If you want your executor or attorney-in-fact to have access to your digital assets, you should make that clear in your will or power of attorney.’
I think Document1 is very useful, because issues and the measures are introduced.
In Japan, we should also include matters about digital assets into our wills or other forms.