The Imperial Household Agency expressed its view that mental and physical stress is the root of these disorders, mainly coming from the anxiety over the issue related to the succession to the Imperial Throne, saying 'The Emperor is concerned about various problems related to the Imperial household including the issue over the succession to the Imperial Throne.'
原因は心身のストレスであり、宮内庁は「将来にわたる皇統の問題を始め、皇室にかかわるもろもろの問題を憂慮されている」と述べ、ストレスの中心に皇位継承問題があるとの考えを示した。