To reduce complaints about side effects such as head ache and absence of effect because of utter disagreement to personal head skin conditions among not a few of users resulting from direct permeation of chemicals or the like into heads in the conventional hair restoration and trichogenous technique.

A generic pattern intrinsic to a subject is extracted from a sample taken from his hairs. The head is irradiated with wave energy using hands by synchronization thereof with mental force. The wave energy thus applied stimulates and activates trichogenous hormone thereby enabling gradual restoration of hairs.