To my knowledge, 吉川 (yoshikawa) serves only as a name. And yet, for some reason, 吉川線 ("yoshikawa lines" as it were) has the meaning of marks on the neck usually indicative of strangulation https://jisho.org/search/yoshikawasen . Is there a story about why such a meaning came about to "yoshikawa-lines"? E.g. there was a mass murderer named Yoshikawa who strangled many victims.

For what it's worth, I came across the term in Summertime Render (an anime)

  • 2
    Not trying to sound snarky, but did you try looking it up? ja.wikipedia.org/wiki/%E5%90%89%E5%B7%9D%E7%B7%9A
    – Leebo
    Sep 18, 2022 at 8:46
  • @Leebo I didn't want to sift through japanese articles, because my kanji skills are shit >.<. But I think I got the important part. Thanks! I'll write up an answer
    – chausies
    Sep 18, 2022 at 9:41

1 Answer 1


According to Japanese wikipedia:

名称の由来は、日本・警視庁の鑑識課長を務めた吉川澄一(1885年 - 1949年)が、ひっかき傷が他殺の証拠にあると着目し、学会で発表した事にちなんでいる。

Roughly translated: "The origin of the name comes from the fact that Chouichi Yoshikawa (1885-1949), who served as the head of the forensics section of the Tokyo Metropolitan Police Department, focused on the fact that such markings were evidence of a murder, and made a presentation at an academic conference."

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