In Ko 'headed by KOSHI NO KIMI' (no given name), as many as six members died in one year, because the first half of the ninth century was a rare time in ancient Japanese history when natural disasters occurred continuously.
「戸主高志公」（名を欠く）の戸では1年間に6名もの人が亡くなっているが、9世紀前半は日本古代史上でもまれにみる天変地異の続いた時代である。