This study aims to develop essential technologies to predict and support the recovery of memory functions impaired by aging or neuropsychiatric disorders. Focusing on working memory, episodic memory, and attention, we will analyze whole-brain dynamic connectivity to create “dynamic markers.” These markers will help identify features common across disorders and contribute to predicting cognitive decline and the onset of dementia. Furthermore, by applying these markers, we will develop an fMRI-based neurofeedback training system, establishing a new approach for restoring memory functions.