JMSJ LaTex template files tips

Suggested by Dr. Enomoto (3 Oct. 2014), use of natbib for references.

example.tex
jmsjart.cls

Suggested by Dr. Masunaga (28 May 2019) for graphics.

\documentclass{jmsj}    % instead of \documentclass[draft]{jmsj}
\usepackage[dvipdfmx]{graphicx}  % or with an other dvi driver you prefer

And use \includegraphics as you typically do.