sˈoʊmə tˈɑːʃɪtˌeɪn mˈæɹid ɐn ɐdˈɑːptᵻd dˈɔːɾɚɹ ʌv ʃˈɑːɡʌn tˌoʊkjuːɡˈɑːwə haɪdtˈɑːdə tə fˈɜːðɚ sᵻmˈɛnt hɪz pəzˈɪʃən, ænd ɹᵻloʊkˈeɪɾᵻd hɪz sˈiːt fɹʌm oʊdˈɑːkə kˈæsəl tə sˈoʊmə nˌækɐmjˈʊɹɹə kˈæsəl, bˈɪldɪŋ ɐ kˈæsəl tˈaʊn dɪzˈaɪnd ˌɔn ɐ ɡɹˈɪdpˈætɚn ɪn ˌɪmɪtˈeɪʃən ʌv kaɪˈoʊɾoʊ.
Sōma Toshitane married an adopted daughter of Shōgun Tokugawa Hidetada to further cement his position, and relocated his seat from Odaka Castle to Sōma Nakamura Castle, building a castle town designed on a grid-pattern in imitation of Kyoto.