Tsunehiro was a son of [[Yonehara Heinaizaemon]]. He first served [[Amako Haruhisa]] and received [[Takase castle]] in 1562. He later betrayed the [[Amako clan|Amako]] and joined the [[Mori clan|Môri]], fighting against his former masters at [[Second Siege of Gassan-Toda|Gassan-Toda]] in 1564-66. At that time he clashed with the forces of his own father-in-law, Amako general [[Sase Kiyomune]]. Tsunahiro was later asked to join the forces under [[Amako Katsuhisa]] then preparing to make a bid to recapture Gassan-Toda. He gave his tacit acceptance but when the Amako and Môri clashed between 1569-1570, he sat on the fence waiting to see what the prospects for success were. Nonetheless, the Môri turned on Takase after defeating Katsuhisa's army at [[Battle of Nunobeyama|Nunobeyama]] and put it under siege. Tsunahiro escaped the castle and made his way to Kyoto, where he lived in retirement until his death. | Tsunehiro was a son of [[Yonehara Heinaizaemon]]. He first served [[Amako Haruhisa]] and received [[Takase castle]] in 1562. He later betrayed the [[Amako clan|Amako]] and joined the [[Mori clan|Môri]], fighting against his former masters at [[Second Siege of Gassan-Toda|Gassan-Toda]] in 1564-66. At that time he clashed with the forces of his own father-in-law, Amako general [[Sase Kiyomune]]. Tsunahiro was later asked to join the forces under [[Amako Katsuhisa]] then preparing to make a bid to recapture Gassan-Toda. He gave his tacit acceptance but when the Amako and Môri clashed between 1569-1570, he sat on the fence waiting to see what the prospects for success were. Nonetheless, the Môri turned on Takase after defeating Katsuhisa's army at [[Battle of Nunobeyama|Nunobeyama]] and put it under siege. Tsunahiro escaped the castle and made his way to Kyoto, where he lived in retirement until his death. |