・Five gravestones and one Christian-related remnant have been found on a small sand hill on the left bank near the mouth of the Kazusa River.
・There is a foundation stone used as an altar, or a stone remnant related to Christianity that seems to have been created for a similar purpose, suggesting that there was a “kapera” (worship facility).
・The characters “る井寸” carved on a gravestone are thought to spell the name “Luis.”