<a href="https://en.wikipedia.org/wiki/Okano_Keijir%C5%8D" class="extiw" title="en:Okano Keijirō">Keijirō Okano</a> (1865–1925)
Unknown author<span style="display: none;">Unknown author</span>
1921
<ul><li><a class="external free" href="https://commons.wikimedia.org/wiki/File:Keijiro_Okano_(2).jpg">https://commons.wikimedia.org/wiki/File:Keijiro_Okano_(2).jpg</a></li>
<li><i>Shōhō Ronbun Sen</i>, Vol. 1, <i>Okano Kyōju Zaishoku Nijūgonen Shukugakai</i>, 1921 / 『商法論文選 第一輯』 岡野敎授在職二十五年祝賀會、大正十年</li></ul>