In 1855 Awaji no kami WAKISAKA measured the tomb and noted that the dromos was '11 ken (about 1.8 meters) 3 shaku (about 30 centimeters) 4 sun (about 3 centimeters)'.
1855年（安政2）には脇坂淡路守が羨道の長さを「奥行11間3尺4寸」、玄室は3間、幅と高さ2間半と計測している。