Winners of All-Japan Judo Championships in <a href="https://en.wikipedia.org/wiki/1936" class="extiw" title="en:1936">1936</a>.
<a href="https://en.wikipedia.org/wiki/Kodansha" class="extiw" title="en:Kodansha">Kodansha</a>
The Japanese book 『柔道百年の歴史』