They attacked Bingo no kuni (Bingo Province, currently part of Hiroshima Prefecture) however, they were defeated by the young Hiromori SUE, who had the role of rusuiyaku (a person representing the master during his absence) of Suo Prefecture and did not take up Noriyuki's invitation, and the following year Noriyuki committed suicide at his hideout at Umagatake Castle in Buzen Province.
備後国などを急襲したが、教幸の誘いに乗らなかった周防国留守居役であった若年の陶弘護に敗北を喫し、翌年逃亡先の豊前国馬ヶ岳城で自害した。