In 1527, Tsunehisa led his force to Bingo Province but was defeated by Okifusa SUE, which encouraged most local lords of Bingo Province to defect from the Amago clan to the Ouchi clan.
翌大永7年（1527年）、経久は自ら備後へと兵を出兵させるも陶興房に敗走し、尼子方であった備後国人の大半が大内氏へと寝返った。