2010-11: Juuso Ikonen played in 14 games (including one playoff game) for Espoo Blues' U20 team, was a top scorer at the U18 level and skated for Finland's U17 team in the 2011 World Hockey Challenge. He scored 3 goals with 4 assists and was +1 playing at the U20 level. Espoo captured the championship at the U18 level. Ikonen scored 14 goals with 21 assists and had 2 penalty minutes in 24 regular season games and in 13 playoff games scored 5 goals with 13 assists and 4 penalty minutes. He scored 3 goals with 2 assists for Finland at the 2011 WHC and also skated for Finland's U16 team.
2011-12: Ikonen made his debut in Finland's SM-Liiga as a 16-year-old — playing for Espoo Blues —and was the second-leading scorer for the club's U20 team; representing Finland at the U18 and U17 level. He scored 4 goals with 5 assists and was +1 with 4 penalty minutes in 20 regular season games. Ikonen skated in 15 SM-Liiga playoff games as Espoo reached the semifinals and scored 4 goals with 2 assists; finishing +7 with 2 penalty minutes. In 32 U20 games he scored 20 goals with 21 assists and was +16 with 14 penalty minutes. Skating for Finland's U18 team at the 2011 Ivan Hlinka Memorial Tournament he scored 4 goals with 5 assists and was +7 and at the 2012 World Junior Championship he had 1 assist and was -1 in five games. Ikonen was an assistant captain for Finland's U17 team and scored 3 goals with 8 assists in eight international games.
2012-13: Ikonen played 57 games for Espoo Blues in his first full SM-Liiga season before joining the club's U20 team for it's playoff run and skated for Finland's bronze medal-winning U18 team at the 2013 World Junior Championship. He scored 13 goals with 13 assists and was +1 with 4 penalty minutes on an Espoo team that missed the playoffs; finishing 12th. Ikonen scored 3 goals with 10 assists and was +5 in ten U20 playoff games as Espoo Blues reached the finals against HPK. He scored 2 goals with 7 assists and was +2 with 2 penalty minutes in seven games at the WJC in Sochi. Ikonen was ranked 23rd amongst European skaters in Central Scouting's final rankings prior to the 2013 NHL Draft but was not selected.
2013-14: Ikonen began the season with Espoo Blues before a transfer to JyP and was part of Finland's gold medal-winning U20 team at the 2014 World Junior Championship. He scored 4 goals with 6 assists and had two penalty minutes before the move to JyP. In his first 22 games with JyP he had 7 assists and was an even plus/minus with 4 penalty minutes. In seven games at the World Junior Championship he scored 1 goal with 2 assists. Ikonen was ranked 105th amongst European skaters in Central Scouting's mid-term rankings prior to the 2014 NHL Draft.
Ikonen is a highly-skilled scorer and quick skater who was a big scorer at the junior levels. A bit undersized, he is not especially abrasive and tends to play in the outside areas. His game may be better suited to the bigger rinks and less combative style of play in Europe.
Ikonen is among the most technically-skilled players in his age group but his size and the lack of any physical component to his game are obstacles to him attaining success at the NHL level. Likely to spend most or all of his career playing in Europe, his offensive abilities could intrigue an NHL club willing to show patience and allow him to grow in the other aspects of the game.