2) Scope of the Estate
As a general rule, the subject property to be distributedthe property is that was owned at the time of the inheritance’s death and still exists , and its scope shall be determined.
And Tokyo family court add as a note
Property of which the way of distribution is determined by a will or agreement of inheritance distribution will not be subject to division.
If someone hid or used the heritage without permission, procedures other than distribution of the estate would be required.