The New Year Ekiden, (officially the 全日本実業団対抗駅伝競走大会 (All-Japan Men's Corporate Team Ekiden Championships?)), is an annual men's ekiden (road running relay) over 100 kilometres which takes place in Japan's Gunma Prefecture on 1 January. The race is a national championship contested between Japan's corporate (business) running teams. There is also an annual championship race for women in Japan – the Women's Corporate Ekiden Championships. The race starts and ends in the city of Maebashi and the course passes through the major cities within the prefecture, including Takasaki, Isesaki, Ota and Kiryu. The relay is divided into seven legs of varying lengths that alternate on a frequent basis. The 2012 race was divided as follows: 12.3 km, 8.3 km, 13.6 km, 22 km, 15.8 km, 12.5 km and 15.5 km.
Historically, the race was conducted around Kashiko Island in Mie Prefecture at its inauguration in 1957. Over the first 30 years of the competition's life it expanded from an 83 km race to a 99 km one. The 31st edition in 1986 was held around Hikone and the Shiga Prefecture, but the race moved again the following year to its current location of Gunma. At this point the distance was reduced to around 85 km and the full 100 km format was introduced at the 2001 ekiden. The first competition featured 14 corporate running teams and this number steadily increased until 1995, when the entry was limited to 37 teams. The 50th edition in 2006 proved to be an except in this respect, as 43 teams were allowed entry in respect of the five people killed during the East Japan Railway derailment accident on 25 December 2005.