But one of the regents was Ieyasu Tokugawa, who had been biding his time at Edo for 12 years, nurturing dynastic ambitions of his own.
Ieyasu Tokugawa did not spend any time in Edo.
mnli hypothesis: Ieyasu Tokugawa did not spend any time in Edo. premise: But one of the regents was Ieyasu Tokugawa, who had been biding his time at Edo for 12 years, nurturing dynastic ambitions of his own.