Informations

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The author name is 比智酷 and could be read Hitchcock (Hichikoku).
There is a second story called 幽霊藻 (yûrei-mo) by 黒須喜代治.

https://ekizo.mandarake.co.jp/auction/item/itemInfoJa.html?index=415520

https://ekizo.mandarake.co.jp/auction/item/itemInfoJa.html?index=266048

https://twitter.com/ikkyujapan/status/954876609957281792