2009-10: Janne Juvonen played at three levels for the Jokipojat club in Joensuu, Finland. He appeared in one game with the club's U20 team and split the year between the U18 and U16 squads. Juvonen played six games for Finland's U16 team.
2010-11: Juvonen appeared in 20 regular season games and seven qualifying playoff games for Jokipojat's Division 1 U20 team as a 16-year-old, sharing the goaltending duties with Milo Pirttinen. He also skated for the club's U18 team and represented Finland at the 2011 U17 World Hockey Challenge. Juvonen had a 3.18 goals against and .905 save percentage in the regular season for the Jokipojat U20 team and had a 4.24 goals against and .877 save percentage in the playoffs. Jokipojat finished second in it's group in Division I and finished second to Kiekko-Vantaa in the playoffs – just missing elevation to the top division. Juvonen posted a 1.00 goals against and .950 save percentage in four games with Jokipojat's U18 team. In four games at the WHC he had a 4.00 goals against and .907 save percentage.
2011-12: Juvonen made his SM-Liiga after going from the Division 1 Jokipojat club to top division Pelicans and made his first pro start in the final game of the SM-Liiga finals. He made his pro hockey debut in a relief appearance in November and played in another late season game. He was 1-1 in his two regular season appearances with a 2.66 goals against and .923 save percentage. With Pelicans starter Niko Hovinen injured during the playoffs, Juvonen came on in relief of Joonas Kuusela to start the third period in Game Four of the finals against JyP, a 5-4 overtime loss. Juvonen started the decisive fifth game, stopping 26 of 28 shots in a 2-1 overtime loss. In 20 games for the Pelicans U20 team he had a 2.86 goals against and .912 save percentage. He played 15 games for the Pelicans U18 team and had a 2.10 goals against and .905 save percentage.
2012-13: Juvonen appeared in four games for Pelicans – which slipped from second to 11th place in the SM-Liiga. He spent most of the year with Peliitat in Mestis and with the Pelicans U20 team. Juvonen represented Finland at the 2013 U20 World Junior Championship. He was 1-3 with Pelicans with a 3.51 goals against and .884 save percentage, playing in three early season contests before being loaned to Peliitat and appearing in one March game. In 17 games for seventh-place Peliitat he had a 3.18 goals against and .902 save percentage and he did not play in any playoff games. Juvonen played 11 games for Pelicans U20 team and had a 2.97 goals against and .902 save percentage. He stopped all 15 shots in his only game at the WJC, an 8-0 shutout of Germany in the relegation round. Not among the 10 European goalies in Central Scouting's final rankings, Juvonen was selected by Nashville in the seventh round (203rd overall) in the 2013 NHL Draft.
Jovonen is one of many talented Finnish goaltenders currently out there in the hockey world. He is not the biggest guy at 6’1” but he is fundamentally sound and shows a decent amount of athleticism. With his lack of size though Juvonen could stand to increase his lower body strength to cover more laterally. He could also stand to be more aggressive towards shooters to compensate for his small size. He may develop that with confidence as he progresses but for now he has a style that does not quite match up with his size. That being said he is a calm goaltender and can rely on the basics to get him by.
Juvonen has gone through the junior squads of the Pelicans of the SM-Liiga, and he will get to be a full-time backup with the senior squad this year. He will be behind veteran Jere Myllyniemi. He will probably not see many starts but he will be up with the big club which is a positive step for his development. Many of his goaltending pipeline counterparts are in similar situations so it is anyone’s game right now in terms of NHL future.