Timing Janna's ultimate can push enemies away from a wounded ally or even separate enemies.
Eye of the Storm can be used on allied turrets.
Quickly firing a Howling Gale without the charge up can be used to heavily disable the other team.
When Kayn is in terrain near you, you will get a visual warning on the edge of the terrain he's in.
Umbral Trespass requires Kayn to damage a target first. Try to dodge Blade's Reach to deny him a long range cast of Umbral Trespass.
Damage Kayn while he's in Shadow Step to shorten its duration, or apply hard crowd control (stun, charm, knockup, etc) to end Shadow Step immediately.
The stat comparisons shown on this page emphasize several influential Janna against Kayn matchup statistics that can help us grasp the differences and similarities between the pair. Janna’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Kayn’s KDA ratio of NaN, demonstrating that Janna may be more central to her team's team fighting capacity than Kayn. This observation is largely a result of the differences in assists.
Janna often has a significantly smaller longest kill spree than her counter does. Commonly, she receives less damage than Kayn. This commonly reflects differing health capacities, yet it can also illustrate that the one champion has less agility and thus is not able to kite away from additional damage when engaged or poked.
Both League of Legends champs are great. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Janna usually wins when trying to fight Kayn, with a 52.5% win rate. As a result, Janna makes a good counter to Kayn.
While Janna does have a higher winrate than Kayn, when they face off with one another, Janna also has a lower level of difficulty that makes her a less difficult champ to learn and master. You don't need to be too worried when picking Janna into Kaynas her relative depth means you may not be able to unleash her full potential without a significant amount of practice beforehand.
Additionally, Janna also has a very large amount of utility and CC, a similar amount to Kayn. This often makes her just as valuable during teamfights, especially when fighting champions with a ton of burst damage.
While there is not one best champion overall in League of Legends, in Janna vs Kayn matchups, Janna is the better champ with a noticably higher win rate, less champion complexity, and a similar amount of utility to help out your allied champions during team fights.
Janna is an above average counter for Kayn. You will do well by focussing your gameplay on increasing your CS and clearing objectives. If you can do that, you should do very well as Janna against Kayn.
To truly master Janna in order to counter Kayn during both the laning and mid / late game phases of League of Legends, you should continue reading to gather a few extra lessons on this matchup. If you pay attention to the build and stats presented above, you should increase your win rate significantly and be that much closer to League of Legends pro players.
Janna often picks up a similar amount of CS compared to Kayn. Champs who typically don't take much CS typically don't need much CS to be effective, such as support champions. They are capable of scaling well off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, usually need many items to be effective. In either case, try to surpass the numbers reported here to do well.
The most important items to prioritize in your Janna versus Kayn build consist of Shurelya's Battlesong, Solstice Sleigh, and Imperial Mandate. When Janna bought at least these three pieces in her build, she performed a lot better vs. Kayn than with many other typical counter builds. In fact, Janna boasted an average win rate of 52.5% when playing against Kayn with these items in her kit.
To have the greatest likelihood of crushing Kayn as Janna, you should use the Summon Aery, Manaflow Band, Celerity, Scorch, Eyeball Collection, and Relentless Hunter runes from the Sorcery and Domination rune sets. Out of all the runes that we analyzed for Janna vs Kayn counter picks, this sequence of runes yielded the greatest win rate. In fact, these runes provided a 52.5% winrate overall.
By default, tips, statistics, and builds on how to beat Kayn as Janna are displayed for every ranked division. To scope the stats and builds to an individual player tier, you can use the selection menu earlier in the counter matchup guide.