In 961, near the end of Tsunemoto's life, he expressed his last request; 'I ask to be interred on this site after my passing, as I will become a dragon god and dwell in the lake of my estate where I will pray for the prosperity of my descendants.'
応和元年（961年）、経基は臨終に際し、「死後は龍神となって邸内の池に住み、子孫の繁栄を祈るから、この地に葬るように」と遺言した。