Jax benefits greatly from items that have both Ability Power and Attack Damage such as Guinsoo's Rageblade and Hextech Gunblade.
Jax can Leap Strike to friendly units, including wards. You can use them to plan your escape.
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 provided here underscore some critical Jax vs. Kayn counter stats that can help you appreciate the differences between the pair. For instance, Jax’s KDA ratio ([kills + assists] / deaths) of NaN is more than Kayn’s KDA ratio of NaN, demonstrating that Jax may be more central to his team's team fighting capacity than Kayn..
Jax often has a similar longest kill spree as his enemy does. On average, he takes less damage than Kayn. This commonly reflects differing health capacities; however, it can also indicate that the one champ has less agility and thus is not able to kite away from additional damage when poked or engaged.
Both League champions are great champions. Both champs have their strengths, weaknesses, and counters. In League's current meta, Jax usually fairs equally well when trying to fight Kayn, with a 50.3% win rate. Therefore, Jax makes an ok counter for Kayn.
While Jax does have a higher win rate compared to Kayn, when on opposite teams, Jax also has a lower level of difficulty that makes him a less time consuming champ to develop with. You should be careful when picking Jax into Kayn.
Moreover, Jax also has some amount of CC and other utility, a similar amount to Kayn. This often makes her just as valuable during teamfights, especially when trying to counter champions with a ton of burst damage.
While there isn't one best champion for every situation in League of Legends, in Jax vs Kayn matchups, Jax is the better champ with a similar win rate, less champion complexity, and a similar amount of utility to help out your team members during teamfights.
Jax is a decent counter to Kayn. Make sure you focus your strategy on increasing your gold income and clearing objectives. If you do that, you should be able to stand on your own as Jax against Kayn.
If you would like to truly master Jax to counter Kayn during both the early game and mid / late game phases of League of Legends, you should keep reading to pick up a few extra lessons on this matchup. If you pay attention to the build and tips displayed above, you should increase your win rate by a lot and be closer to League of Legends pro players.
Jax most often gets much more CS as Kayn. Champs who on average don't earn much CS usualy don't require much CS to be effective, such as support champions. They are able to scale well off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, usually require a lot of items to be effective. In either situation, try to exceed the numbers displayed on this page to do well.
The most crucial items to prioritize in your Jax versus Kayn build include Sterak's Gage, Titanic Hydra, and Sundered Sky. When Jax bought at least these three pieces in his build, he did a lot better countering Kayn than with most other commonly used item sets. In fact, Jax had an average win rate of 50.3% when playing against Kayn with this counter build.
To have the best probability of vanquishing Kayn as Jax, you should take the Lethal Tempo, Triumph, Legend: Alacrity, Last Stand, Magical Footwear, and Cosmic Insight runes from the Precision and Inspiration rune sets. Out of all the rune builds we have analyed for Jax vs Kayn battles, this composite of runes yielded the highest win rate. Moreover, these runes provided a 50.3% win rate overall.
By default, tips, stats, and builds on how to beat Kayn as Jax are given for all skill levels combined. If you want to scope the stats and builds to a distinct rank, you can use the selection menu at the top of this page.