\begin{theindex}

\centerline{\bfseries ◆◆◆ M ◆◆◆}\par\nobreak
  \item Mendex\leaders\hbox{$\cdot$}\hfill 1
    \subitem のインストール\leaders\hbox{$\cdot$}\hfill 1
    \subitem ---の使い方\leaders\hbox{$\cdot$}\hfill 1
      \subsubitem ---応用編\leaders\hbox{$\cdot$}\hfill 1
      \subsubitem ---入門編\leaders\hbox{$\cdot$}\hfill 1

  \indexspace

\centerline{\bfseries ◆◆◆ サ ◆◆◆}\par\nobreak
  \item 里見弴\leaders\hbox{$\cdot$}\hfill \see{あ}{1}

  \indexspace

\centerline{\bfseries ◆◆◆ シ ◆◆◆}\par\nobreak
  \item 𠮟咤激励\leaders\hbox{$\cdot$}\hfill 1

  \indexspace

\centerline{\bfseries ◆◆◆ モ ◆◆◆}\par\nobreak
  \item 森鷗外\leaders\hbox{$\cdot$}\hfill 1

\end{theindex}