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Books about Ujimoto:
Carlo Caldarola, Mitsuru Shimpo, and K. Victor Ujimoto. Sakura in the Land of the Maple Leaf: Japanese Cultural... by Patricia E. Roy (Mar 21, 2013)
Wiki information Ujimoto:
Katsurayama Ujimoto was a Japanese samurai of the Sengoku period, who served the Imagawa clan.