SADATSUGU (貞次), Shōwa (昭和, 1926-1989), Niigata – “Sadatsugu saku” (貞次作), “Echigo Ginzandaira no fumoto-jū Unryūshi Sadatsugu kore o saku” (越後銀山平麓住雲龍子貞次作之), “Echigo-jū Unryūshi Sadatsugu saku” (越後住雲龍子貞次作), “Unryūshi Sadatsugu saku” (雲龍子貞次作), “Seikon Echigo-jū Unryūshi Sadatsugu tsuma Kimi sakite o motte kore o saku” (精魂越後住雲龍子貞次以妻キミ先手作之, “made with heart and soul by Unryūshi Sadatsugu from Echigo, supported by his wife Kimi as sakite”), real name Watanabe Genji (渡辺源次), born February 12th 1919, son of Sadanari (貞作), he studied under his father, jōkō no retsu (Akihide)