He fell ill, and while he was convalescing at a hot spring, he was betrayed and the bath-house was soon surrounded by men sent by Shigesada SADO; caught stark naked, Tametomo gave in without a fight.
病に罹り、湯治をしていたところ、密告があり湯屋で佐渡重貞の手勢に囲まれ、真っ裸であり抵抗もできず捕えられた。