According to the 'Takajirocho history,' those including Kiyomasa KATO and Suketaka ITO, who shared the borders with the Shimazu clain, provided support including materials in secret, although they are not counted as a direct military power.
（高城町史）また、直接的な兵力ではないが、物資の援助などを島津氏と領地を隣接する加藤清正、伊東祐兵らが密かに行っている。