#6 Jushin Liger (54) and Minoru Suzuki (51)
The main reason why these two NJPW stars are paired together is because they just capped off a feud that actually saw Minoru Suzuki show an opponent a modicum of respect. If you watched wrestling in the late 1980s and early 1990s, then you may or may not remember Jushin Liger facing Brian Pillman in WCW. It was a great showcase of two performers from different countries wrestling a similar style.
Normally, stars that were active during that time period are either "Legends" or retired, but that is not the case with Liger. The Japanese star has been wrestling ever since and is doing some great work in NJPW. He's been a fixture of the Junior Heavyweight Division, but lately Liger has been battling the deranged Minoru Suzuki. Liger's longevity has allowed him to face many of the preeminent junior heavyweight stars of this generation, including one of the best in the world in Will Ospreay.
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Suzuki has been terrorizing NJPW as the leader of Suzuki-gun. During Suzkuki's time in NJPW, he has claimed both the IWGP Intercontinental Championship and the Never Openweight Title, winning both in 2018. It's crazy to think that a wrestler who co-created one of the first MMA promotions, Pancrase, is still wrestling at a high level well into his 50s.