泥海の浮き城

From Author Wars - https://authorwars.com/books/ni-hai-nofu-kicheng-2353005.html

Overview:

Title: 泥海の浮き城
Author: 酉島伝法
Year: 2013
Type: Short Fiction

Variant Titles:

2018. Castellum Natatorius (or, The Castle in the Mudsea)

Editions/Publications:

2013 . 皆勤の徒 (2013, 酉島伝法, 東京創元社, ISBN-10: 9784488018177, 342 pages, Hardcover, Collection)