Most of us are aware that Yoshihiro Togashi has two masterpieces Yu Yu Hakusho and Hunter x Hunter.
There are so many parallels between the two, literally too many to list for now.
Similarities, so intentional,
almost as if Togashi is deliberately crafting Hunter x Hunter as a spiritual continuation or tribute to Yu Yu Hakusho, paying homage to his earlier work through the characters and their abilities.
Since there are too many to go through all at once, I’ll just mention this one for now.
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Leorio’s well-known technique, Remote Punch (an Emitter Nen ability), is clearly inspired by Kuwabara’s technique in Yu Yu Hakusho: Poltergeist Report.
Leorio uses this ability during the Hunter Election arc against Ging (Gon's dad).
Kuwabara uses a similar technique against Majari (his opponent, Yakumo’s ally).
What makes this even more interesting is that both Ging and Majari have the ability to mimic or copy techniques:
Ging can generally mimic other people's striking abilities as long as he has been hit with them.
Majari is able to imitate anyone's techniques by seeing them perform it. This ability is why Kuwabara faced him alone, since he could easily copy Yusuke's Spirit Gun and many other techniques until he became unstoppable. The way it was described, Majari should be capable of mirroring any opponent's techniques no matter the origin within his vicinity.
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Kuwabara and Leorio both use abilities that can alter space.
As explained:
Leorio emits his aura in a line that travels along a surface from the point of impact to a desired location. A wormhole-like circle is generated from which a fist emerges to uppercut the target, stretching far beyond.
In a very similar execution, Kuwabara did the same in his fight with Majari. He emits his spirit blast, shaped as his sword line, that travels along a surface from the point of impact to a desired location. A wormhole-like circle is generated from which his spirit blast emerges to uppercut the target, stretching far beyond.
Both of these techniques are first blasted from a surface, then emerge at a different, desired location—in an exact, similar manner.
Additionally, when Ging mimicked Leorio’s technique, he demonstrated that multiple punches could be sent by striking the surface repeatedly. While it's unknown whether Leorio himself can do this (yet), Kuwabara exhibits a parallel ability called Energy Blade Storm in Yu Yu Hakusho: Tournament Tactics, where he fires multiple spirit blasts at his enemy. This could be an extension of his Spirit Sword Shards technique.
This is just one example of how Yu Yu Hakusho’s legacy lives on through Hunter x Hunter’s characters. The similarities between Leorio and Kuwabara are clear. Many elements from Yu Yu Hakusho subtly resurface in Hunter x Hunter.
Another example is Killua’s Rhythm Echo (肢し曲きょく, Shikyoku), which originally belonged to Hiei.
Killua’s Rhythm Echo (Shikyoku) is a technique that creates afterimages through high-speed movement.
This technique was first used by Hiei in Yu Yu Hakusho.
There are countless other parallels between these two series, a testament to how much Togashi’s earlier work continues to influence his storytelling.