Just want to recommend the latest issue of Japan Railfan Magazine, especially those interested in older rolling stock. The edition has a special section on the design and coloring of JNR's rolling stock from the late 50's to early 60's, and includes a nice fold out plate and color pictures. Also an insert for major private railway rolling stock rosters as of April of this year, very informative.
http://railf.jp/japan_railfan_magazine/point/628.html