The exact date of Ienari's death was recorded as February 27, 1841, in the Diary of Takako IZEKI, whereas, according to "Shoku Tokugawa Jikki"(the Sequel to the Collection of Official Records of the Edo Bakufu), it was March 22, 1841, suggesting that the bakufu had concealed his death for some time.
なお、死亡日は『井関隆子日記』には閏1月7日と記されているが、『続徳川実紀』は「閏1月30日」としており、幕府による死の秘匿が行なわれたものと思われる。