耳孔 is read as じこう (jikou) and means earhole.
じこう
jikou
みみざわり
hard (on the ears)
みみかざり
earring
みみわ
earring (non-pierced)
じひょう
earmark (on cattle, etc.)
じもくをおどろかす
to take by surprise
あな
(partitioned) box (type of floor seating in a traditional Japanese theatre)
どうこう
pupil (of the eye)
いちぎめこう
index hole
つうきこう
vent
くうきこう
air pocket
じぼく
eyes and ears
みみ
ear