pillion
フィリピンで日本人の男性が銃で撃たれ亡くなりました。
Japanese businessman shot dead in Philippines
Japanese man was shot dead on Thursday evening by a motorbike-riding assailant just hours after he arrived in the Philippine capital Manila on a business trip, police said Friday.
The gunman, riding pillion on the motorbike driven by an accomplice, shot at a van carrying 48-year-old victim Seiki Mizuno, three other Japanese and two Filipinos, including the driver.
Police said that based on witness testimony, the attack apparently targeted Mizuno, a businessman from Aichi Prefecture whose company makes parts for pachinko machines.
Mizuno, who was seated in the middle row of the van, behind the driver, sustained a fatal gunshot wound to his neck.
The incident occurred shortly before 8:30 p.m. Thursday near Manila Bay as he and 18 other Japanese nationals, in a convoy of four vans, were returning to their hotel after taking dinner.
（以下省略）
https://japantoday.com/category/crime/japanese-businessman-shot-dead-in-philippines
今回はpillion/ˈpɪljən/について調べました。Oxford Dictionary of English(Second Edition Reserved, Oxford University Press)には、 “a seat for a passenger behind a motorcyclist”とのことでした。語源は『ジーニアス英和辞典』（第五版，大修館）で調べたところ、「（馬の）添え鞍，（オートバイの）後部座席」と載っておりました。 “pillion seat”と表記することが多いようです。副詞として使用することも可能です。 “ride pillion”で相乗りという意味になります。
語源はゲール語（スコットランド）やアイルランド語で、 “small cushion”を表すpilleanとpillinだそうです。（Gomez）
