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 first DVD volume from season 4 was released on October 28, 2009. 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 Shiroyasha Kotan(白夜叉降誕, lit. "White Demon's Birth") , 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 & 2005 wh