イヤリング vs ピアス
An イヤリング is an ear accessory that does not require a piercing. The word refers only to accessories worn on the ear.
A ピアス is jewelry worn through a piercing, whether on the ear or elsewhere on the body.
Further Reading
- 「イヤリング」と「ピアス」 (edewakaru.com)
- 「イヤリングありますか?」|間違った日本語 (edewakaru.com)
Examples
A picked-up earring with イヤリング

Takeo runs after a mother and her child to give them a shoe they dropped. Due to Takeo’s large size and loud steps, the mother and child get frightened and run from him. After he manages to return the dropped item, Takeo returns to his friends. Rinko remarks that the scene was like “A Bear in the Forest”. Sunakawa recalls the song.
- 砂川:
- 「あーイヤリング拾
( って追( いかけるやつね」- “Ah, the one who picked up an earring and chased after.”
- 猛男
( : - 「そうか 熊
( だと思( われたのか」- “I see. It's that I was thought of as a bear?”
An earring under the sofa with イヤリング

Poking around the scene of a murder, Conan discovers a clue underneath a sofa.
- コナン:
- 「こ、こんな所
( にイヤリングが!?」- “An earring in such a place...?!”
Bead as an earring with ピアス

Komura sees Mie pick up an item she dropped and he wonders if it’s an earring. During class later, Mie shows Komura the item held up to her ear calling it a 「ピアス」. She then reveals it’s just a bead.
- 三重
( : - 「私
( ピアス開( けてないし」- “Since I don't have my ears pierced.”
- 小村
( : - 「あっ… …今朝
( 落( としてたのもビーズ?」- “Ah, the item you dropped this morning was a bead?”
- 三重
( : - 「うん」
- “Mmhm.”