Je was op zoek naar: crossbones (Engels - Japans)

he had a map that showed your house marked with a skull and crossbones.
彼は あんたの家に骸骨マークを描いて そこへ行く道を示した簡単な地図を持ってた

i couldn't help noticing, on the map of the moor, a skull and crossbones?
沼地の地図に どくろマークが？

that house is marked on this map with a skull and crossbones. what are the usual reasons for being in juvie?
ここは 地図で 骸骨マークがついてた場所だ

this skull and crossbones was named based on the world-famous captain kidd who was active in late 17th century britain.
このドクロマークは17世紀後半にイギリスで活動した世界的に有名な海賊キャプテン・キッドにちなんでつけられた。