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In page Date Tsunamune:

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As for Tsunamune, he lived the next 50 years in loose house arrest at the clan residence in the Ōi area of Edo, devoting his time to the arts, studying painting under Kanō Tan'yū, calligraphy, waka poetry, Maki-e lacquerware and even learning to forge Japanese swords. A number of his works are on display at The Miyagi Museum of Art. He died in Edo in 1711, but his grave was at the Date clan mausoleum of Zuihōden in Sendai. His mortuary temple was destroyed in 1945 during the Bombing of Sendai during World War II, and reconstructed in 1981. His body was so well preserved that an autopsy could be performed, revealing that he had a height of 158 cm and blood type A+, and had died of oral cancer.