ジャンプフェスタ
In Japan, Aniplex distributes the anime in DVD format. A total of thirteen volumes were released for the first season, between July 26, 2006 and June 26, 2007. The second season was released over another set of thirteen volumes between July 25, 2007 and July 23, 2008. Season 3 was released in thirteen volumes from August 27, 2008 to August 26, 2009. The fourth season was collected in thirteen DVD volumes from October 28, 2009 to October 27, 2010. Prior to the series' premier, an original video animation (OVA) of "Gin Tama" by Sunrise was showing at Jump Festa Anime Tour in 2005. A ten-minute long OVA named , set in the war between aliens and samurais, was shown in Jump Festa 2008. On September 30, 2009, it was published a DVD named "Gintama Jump Anime Tour 2008 &amp; 2005" which contains the 2005 and 2008 OVAs.