The Uno Newsletter (in Japanese) started after the 30th Memorial Conference in honour of Kozo Uno: “How to Rejuvenate Uno Theory” held on 1 December 2007 at Musashi University. Twelve issues of the Newsletter were published between December 2007 and April 2010. Selected papers from the Newsletter were published in July 2010 in a book entitled: Current Issues and Contentions of Uno theory: A New Development of Marxian Political Economy, Tokyo Shakai Hyoronsha . The second series of the Uno Newsletter started in June 2010, and 8 issues have been published quarterly. Now we have decided to publish an English edition of the Uno Newsletter once or twice a year.