日本城堡建築結構中，包含「天守」的主要軍事防禦區域，字面意義為「主要的圓體」。本丸為城堡中防護最嚴密的區域，在特定情況下，可作為城堡主人的戰時居所。

本丸(P,,U,繁體中文-偏好,D,,)
pen wan (P,,U,韋氏拼音-偏好,UF,,)
běn wán (P,,U,漢語拼音-偏好,UF,,)
ben wan (P,,U,漢語拼音(無聲調)-偏好,UF,,)
honmaru(P,,V,英文-偏好,D,L,PN)
honmaru(P,,V,Japanese-偏好,D,U,PN)
Honmaru(,V,Japanese-非偏好,UF,U,N)

藝術與建築詞典根目錄
....物件層面
........組件 (層級名)
............成分
................<依特定背景區分之組件>
....................建築元素
........................<依建築種類區分之建築元素>
............................<堡壘建築元素>
................................<防護牆與防護牆結構>
....................................防護牆
........................................本丸

thing(s) needing context are....

天守

英文....	Main fortified areas of Japanese castle complexes, literally "main circles", that contained the "tenshu". These areas were the most protected parts of the castle and, in some cases, were used as the residences of the castle owners during wartime.

本丸............	[AS-Academia Sinica]
.................	有道youdao詞典 April 14, 2015
.................	LINE Dict 英漢詞典 April 14, 2015
honmaru............	[VP]
.................	JAANUS [online] (2001-) accessed 13 November 2008
.................	Mason, History of Japanese Art (1993) 389
.................	Gerhart, Tokugawa Authority and Chinese Exemplars, Monumenta Nipponica (1997)
Honmaru............	[VP]
.................	Grove Art Online (2008-) accessed 13 November 2008
Subject:............	[VP]
.................	JAANUS [online] (2001-) accessed 13 November 2008
.................	Grove Art Online (2008-) accessed 13 November 2008
.................	Mason, History of Japanese Art (1993) 389
.................	Gerhart, Tokugawa Authority and Chinese Exemplars, Monumenta Nipponica (1997)

Getty AAT: 300310679 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300310679
聯合目錄： 本丸 、pen wan 、běn wán 、ben wan 、honmaru 、Honmaru 、honmaru