diff --git a/lib/review/latexbuilder.rb b/lib/review/latexbuilder.rb
index fca6062e5..7761a87b6 100644
--- a/lib/review/latexbuilder.rb
+++ b/lib/review/latexbuilder.rb
@@ -96,6 +96,13 @@ def puts(*s)
     end
     private :puts
 
+    def result
+      if @chapter.is_a?(ReVIEW::Book::Part) && !@book.config.check_version('2', exception: false)
+        puts '\end{reviewpart}'
+      end
+      @output.string
+    end
+
     HEADLINE = {
       1 => 'chapter',
       2 => 'section',
@@ -108,8 +115,13 @@ def puts(*s)
     def headline(level, label, caption)
       _, anchor = headline_prefix(level)
       headline_name = HEADLINE[level]
-      if @chapter.is_a? ReVIEW::Book::Part
-        headline_name = 'part'
+      if @chapter.is_a?(ReVIEW::Book::Part)
+        if @book.config.check_version('2', exception: false)
+          headline_name = 'part'
+        elsif level == 1
+          headline_name = 'part'
+          puts '\begin{reviewpart}'
+        end
       end
       prefix = ''
       if level > @book.config['secnolevel'] || (@chapter.number.to_s.empty? && level > 1)
diff --git a/templates/latex/review-jlreq/review-base.sty b/templates/latex/review-jlreq/review-base.sty
index e5a04f104..b15865a5a 100644
--- a/templates/latex/review-jlreq/review-base.sty
+++ b/templates/latex/review-jlreq/review-base.sty
@@ -106,6 +106,10 @@
 
 \renewcommand{\contentsname}{\review@toctitle}
 
+\newenvironment{reviewpart}{%
+\renewcommand{\thesection}{\thepart.\@arabic\c@section}%
+}{}
+
 % 囲み記事
 \newenvironment{reviewnote}[1][]{%
   \begin{tcolorbox}[skin=enhanced jigsaw,breakable,empty,coltitle=black,title={\sffamily\bfseries NOTE #1},borderline horizontal={0.5mm}{0pt}{black!50}, left=1mm, right=1mm, left skip=6mm]}
diff --git a/templates/latex/review-jsbook/review-base.sty b/templates/latex/review-jsbook/review-base.sty
index 3dba1c55a..e26caf63a 100644
--- a/templates/latex/review-jsbook/review-base.sty
+++ b/templates/latex/review-jsbook/review-base.sty
@@ -197,6 +197,10 @@
 \newcommand{\reviewcolumnref}[2]{\review@intn@columnname #1}
 \newcommand{\reviewsecref}[2]{#1}
 
+\newenvironment{reviewpart}{%
+\renewcommand{\thesection}{\thepart.\@arabic\c@section}%
+}{}
+
 \newcommand{\reviewminicolumntitle}[1]{%
 \review@ifempty{#1}{}{%
   {\large \review@intn@memohead{}: #1}\\}}