Senhime or Lady Sen (千姫; April 11 (May 26 in Gregorian calendar), 1597 – February 6 (March 11), 1666) was the eldest daughter of the shogun Tokugawa Hidetada and his wife Oeyo. She was born during the warring-states period of Japanese history. Her paternal grandfather was the founder of the Tokugawa shogunate Tokugawa Ieyasu; her maternal grandfather was Azai Nagamasa; her grandmother was Oichi, whose brother was Oda Nobunaga.
In 1603, when Senhime was seven years old, she married the successor to the Toyotomi clan, Toyotomi Hideyori and lived with him in Osaka Castle along with his mother, Lady Yodo, who was a sister of Oeyo. Little is known about their life together, but it didn't last long as her grandfather, Ieyasu, besieged the castle in 1615, when she was just nineteen. When Osaka castle fell, Hideyori was forced to commit suicide along with his mother. Senhime was luckier and had been rescued from the castle before it fell.
In 1616, Ieyasu remarried Senhime to Honda Tadatoki, a grandson of Honda Tadakatsu, and in few years she moved to Himeji.
A famous legend tells that a certain Sakazaki Naomori planned to capture Senhime just before her remarriage, wishing to marry her himself. However his plan was revealed and Naomori was either killed or forced to commit suicide. It was long believed that Naomori was the one who saved Senhime out from the Osaka Castle, believing the words of Tokugawa Ieyasu that he would give Senhime to whoever rescued her, though recently this has been doubted. Stories tell that Senhime refused to marry Naomori, whose face was ill-favored because of the burn he got when he saved her, and rather preferred handsome Tadatoki.
Senhime and Tadatoki had an amicable marriage and had two children together, a daughter, Katsuhime and a son, Kōchiyo. However tragedy struck when Kōchiyo died at the age of three, and five years later in 1626, Tadatoki died of tuberculosis. His mother and Oeyo (then known as Sūgen'in) died in the same year. As was the tradition for a widow at that time, Senhime cut her hair short and became a Buddhist nun, taking the name Tenjuin (天樹院), moved back to Edo and spent the long years of the rest of her life there.