The author (SuFlyer) used the PD image <a href="//commons.wikimedia.org/wiki/File:Moji_Branch_of_Nippon_Flour_Mills_Co._Ltd._1931.jpg" title="File:Moji Branch of Nippon Flour Mills Co. Ltd. 1931.jpg">File:Moji Branch of Nippon Flour Mills Co. Ltd. 1931.jpg</a> and colorized it with the neural filter of Adobe Photoshop.
<a href="//commons.wikimedia.org/w/index.php?title=User:SuFlyer&amp;action=edit&amp;redlink=1" class="new" title="User:SuFlyer (page does not exist)">SuFlyer</a>
<span class="int-own-work" lang="en">Own work</span>