Where did Minamoto Yoritomo establish the first shogunate government?

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Minamoto Yoritomo established the headquarters of his military government, known as the Kamakura shogunate, in the city of Kamakura.123

While Kyoto remained the seat of the imperial court and civil administration, Yoritomo chose to build his independent military and political power base in the east, far from the capital's aristocratic influence. This arrangement created a form of dyarchy, where military authority was centered in Kamakura and civil authority remained in Kyoto.23