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© 2026 The Playmaker - Published with Ghost & Aspect
戦力均衡は進んだ。でも、無秩序にはなっていない――「群雄割拠」のNBAで、30年間崩れなかった“優勝の境界線”|Chris's Court Vision

戦力均衡は進んだ。でも、無秩序にはなっていない――「群雄割拠」のNBAで、30年間崩れなかった“優勝の境界線”|Chris's Court Vision

  • Chris Sasaki by Chris Sasaki
    Chris Sasaki Chris Sasaki
    Born in New York and raised in Tokyo, Chris transitioned into broadcasting and analysis after retiring as a player. Known for his clear delivery and data-driven insights, he now works as a commentator, reporter, simultaneous interpreter, and writer.
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「群雄割拠」は、本当に「予測不能」なのか?

ここ8シーズン、NBAの王者は一度も連覇していません。

2017-18シーズンのゴールデンステイト・ウォリアーズがクリーブランド・キャバリアーズを破って以来、NBAファイナルの頂点に立ったチームは、毎年のように入れ替わってきました。

そして今や、「群雄割拠」という言葉は、現代NBAを語るうえで欠かせないキーワードになっています。特定のチームが長期にわたって支配する時代ではありません。

どのチームにもチャンスがある。

だからこそ、シーズンが始まるたびに「今年はどこが優勝するのか分からない」という感覚が強まっています。

――しかし、本当にそうなのでしょうか。

「王者が毎年変わること」と、「どのチームにも優勝の可能性があること」は、果たして同じ意味なのでしょうか。

ここには、見過ごされている違いがあります。もしNBAが本当に「予測不能なカオス」になったのであれば、優勝チームのレギュラーシーズンにおける立ち位置も、もっとバラバラになっているはずです。

上位シードだけでなく、中位・下位シードからの下剋上が増え、レギュラーシーズンで苦戦したチームがプレーオフで一気に頂点まで駆け上がる――。

ところが、過去30シーズンを振り返ってみると、そこには意外なほど明確な「境界線」が存在しています。

戦力均衡は、確かに進んでいます。

しかし、それは無秩序になったことを意味しません。

むしろ、1位シードの絶対性が薄れ、2位・3位のチームにも優勝への道が広がった一方で、優勝争いに加わるための「最低限の条件」は、驚くほど崩れていません。

では、その境界線はどこにあるのでしょうか。

そして、なぜ現代NBAでは「王者は変わり続けるのに、優勝できるチームの条件は変わらない」のでしょうか。

今回は1996-97シーズンから2025-26シーズンまで、30年間のNBA王者とレギュラーシーズンの成績を振り返り、「群雄割拠」の正体をデータから検証していきます。

「誰が優勝するか分からない」。

その感覚は、間違ってはいません。

ただし、それをそのまま「NBAは予測不能なカオスになった」と結論づけるのは、少し早いのではないでしょうか。

王者は分散しました。

しかし、優勝への道筋まで無秩序になったわけではありません。

この30年間のデータが示すのは、そんな現代NBAの、少し意外な構造です。

検証①「下位シードの下剋上は増えたのか?」――崩れない“トップ3”の鉄の掟

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Chris Sasaki Chris Sasaki
Born in New York and raised in Tokyo, Chris transitioned into broadcasting and analysis after retiring as a player. Known for his clear delivery and data-driven insights, he now works as a commentator, reporter, simultaneous interpreter, and writer.
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Chris Sasaki Chris Sasaki
Born in New York and raised in Tokyo, Chris transitioned into broadcasting and analysis after retiring as a player. Known for his clear delivery and data-driven insights, he now works as a commentator, reporter, simultaneous interpreter, and writer.
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