I visited an exhibition of his models at an Osaka museum last month (the segment mentions this):
http://www.jnsforum.com/index.php/topic,5292.0.htmlThe museum in Yokohama will be built to showcase his collection which currently resides in his (very large) home in Ashiya*, including the incredible FS E626 model built from German silver, as well as a model of Korea's first EMU, which he actually rode pre-WW2 (I think the prototype no longer exists, possibly destroyed in the Korean War).
*Mr. Hara married the heiress of the famous Kokuyo stationery/office supply corporation, which likely gave him the wherewithal to pursue his hobby.