Anssi Koivuranta started ski jumping at the age of six , but he soon became interested in cross-country skiing , so that he decided to do Nordic combined at the age of eight . Until recently, however, jumping was his great strength, which gave him good starting conditions for the running competition. He was often the winner of the jumping competition and then could not hold his good position.
Koivuranta starts for the Kuusamon Erä-Veikot club . The then fifteen-year-old celebrated his World Cup debut in a sprint competition on March 5, 2004 in Lahti , after winning a bronze medal at the Junior World Championships in Stryn. In December 2004 he was able to place in the top 10 for the first time in the sprint race in Trondheim . In January 2005, with third place in Sapporo, his first podium followed.
At the 2006 Winter Olympics in Turin , Koivuranta reached third place in the team competition. He celebrated his greatest successes so far at the Nordic World Ski Championships 2007 in Sapporo, where he won the gold medal with the Finnish relay and the bronze medal in the individual.
At the 2008 Nordic Combined Summer Grand Prix, which took place in Hinterzarten , Oberstdorf and Einsiedeln , Koivuranta achieved second place overall. On November 30, 2008, he won his first World Cup race in Kuusamo . He celebrated six more victories in the 2008/09 season and won the overall World Cup ahead of Magnus Moan . At the Finnish championships for special jumpers on the large hill in February 2009 he surprisingly won the title.
In March 2009 he took part in the training of the special jumpers in Planica , Slovenia , where he reached a distance of 214.5 meters on the ski jumping hill .
In the summer of 2010 he fell ill and was unable to train cross-country skiing. That is why he starts as a special jumper in the 2010/2011 season. After Koivuranta had won the Continental Cup jumping on December 18, 2010 in Erzurum, Turkey , he was able to achieve his first World Cup points among the special jumpers with 26th place in the jumping in Oberstdorf on December 29, 2010 as part of the Four Hills Tournament 2010/11 . At the Finnish summer championships on the normal hill on September 25, 2011 in Jyväskylä , he was able to win the title on the normal hill and with the team of Kuusamon Erä-Veikot the silver medal in the team competition. On March 31 and April 1, 2012 he was able to win the title on both the large hill and the normal hill on snow.
In November 2012, Koivuranta had to undergo an operation a few weeks before the start of the 2012/2013 World Cup season because he had been struggling with knee problems for several weeks. At the Finnish championships in mid-January 2013, he returned to the competition.
At the end of October 2013 Koivuranta suffered a mycoplasma infection for the second time and had to take a three-week forced break.
On January 4, 2014 Koivuranta won a special competition as part of the Ski Jumping World Cup for the first time in the third competition of the Four Hills Tournament from Bergiselschanze in Innsbruck . As the leader after the first round, he benefited from the fact that the jumping had to be canceled after 21 out of 30 jumpers in the second round due to the strong changing winds, so that only the first round was counted. Thus, he is the first athlete in history who was able to win both a World Cup competition in Nordic Combined and a World Cup competition in the specialty jumpers.
After the winter of 2014/15 Koivuranta ended his active career.