Nakagawake kurusu, a Japanese <i>kamon</i> (family badge, or coat of arms).
<a href="//commons.wikimedia.org/wiki/User:Tintazul" title="User:Tintazul">Júlio Reis</a> and <a href="//commons.wikimedia.org/w/index.php?title=User:Misogi&amp;action=edit&amp;redlink=1" class="new" title="User:Misogi (page does not exist)">Misogi</a>
CC BY-SA 3.0
Fully redrawn after <a href="//commons.wikimedia.org/w/index.php?title=File:Nakagawa_kurusu01.jpg&amp;action=edit&amp;redlink=1" class="new" title="File:Nakagawa kurusu01.jpg (page does not exist)">Nakagawa kurusu01.jpg</a>, by user <a href="//commons.wikimedia.org/w/index.php?title=User:Misogi&amp;action=edit&amp;redlink=1" class="new" title="User:Misogi (page does not exist)">Misogi</a>.