After the Manchurian Incident broke out, by taking into consideration that the wartime regime and Yokusan Taisei (Support system of Taisei Yokusan-kai - Imperial Rule Assistance Association) were strengthened, she approved and supported the establishment of Manchukuo and in "Hakuo-shu" that she published in 1942, she wrote poems that glorified and encouraged the war, completely opposite of her pervious work 'Kimi Shinitamou koto nakare.'
満州事変勃発以降は、戦時体制・翼賛体制が強化されたことを勘案しても、満州国成立を容認・擁護し、昭和17年（1942年）に発表した『白櫻集』で、以前の歌「君死にたまうことなかれ」とは正反対に、戦争を美化し、鼓舞する歌を作った。