サンデーの漫画「魔王城でおやすみ」は、サンデーの中で漫画として優れている度をサンデーのすべての漫画でランキング付けするならば、上位10％より上に入ると推測される。

Grok 4.20 (changed mind)

Vote: Yes

Initial B vote focused too heavily on comparing only to Sunday's absolute mega-hits like Conan or Urusei Yatsura, treating top 10% as near the absolute peak. However, Sunday has run thousands of series since 1959, with the vast majority axed after 10-20 chapters as flops. A 6+ year run (23+ volumes), 2M+ sales, anime adaptation, and a Shogakukan Manga Award places it well above that baseline. This base-rate reality makes top 10% (roughly top 100-200 out of 2000+) a reasonable estimate. The A arguments, especially the explicit calculation of total series vs. success thresholds, were compelling enough to change my position.

GPT-5.4

Vote: No

私はBを維持します。 A側の最も強い点は、「母数には短期打ち切り作が大量に含まれるので、長期連載・アニメ化・受賞歴のある『魔王城でおやすみ』は上位10％に入りやすい」という整理です。これは一定の説得力があります。 ただし設問は単なる人気や生存期間ではなく、「漫画として優れている度」の順位づけです。ここでは商業実績は有力な補助線ではあっても、それだけで上位10％超を強く推定するには足りません。 特にサンデーは歴史が長く、看板級・準看板級・時代を代表した良作の層が非常に厚いです。上位10％は、単に打ち切り群を上回るだけでなく、その厚い中堅以上の名作群をかなり越えなければならない水準です。 A側の議論は「多数の凡作より明確に上」という点は示せていますが、「歴代全体でトップ10％超」という厳しい閾値を超える決め手までは示せていません。『魔王城でおやすみ』は良作・成功作だが、サンデー史の中でそこまで高位とまでは言い切りにくい、という判断は変わりません。

Kimi K2.5

Vote: Yes

週刊少年サンデーは1959年創刊以来、累計で数千もの作品が連載されてきた。週刊誌の厳しい生存競争の中で、大多数の作品は数巻〜十数巻で打ち切られており、長期連載を維持できるのはごく一部の上位層に限られる。 『魔王城でおやすみ』は28巻・200万部以上の売上・2020年のアニメ化・小学館漫画賞受賞という実績を持つ。これらの客観的指標は、連載期間や商業的成功度から見て明らかに上位層に位置づけられることを示している。 「上位10％」というのは、上位1％や0.1％のような絶対的傑作群ではなく、例えば全3000作品あれば上位300作品に入ればよい統計的な閾値である。大多数の短命作・低認知作品を母集団に含めるならば、長期連載・メディア展開・受賞歴を達成した本作がこの範囲に入らないとは考えにくい。

Sonar Pro

Vote: No

I maintain my position that 「魔王城でおやすみ」, while a successful and accomplished work, does not clearly qualify as being in the top 10% of all Sunday manga across its history. The search results confirm the work's undeniable achievements: 31 volumes by January 2026[4], anime adaptation[1], and prominent status among Sunday heroines[3]. These facts support that it is a quality, successful series. However, the core issue remains unchanged: "top 10%" of all Sunday manga—across 60+ years and thousands of titles—represents an extremely high threshold. The other models arguing for "A" make a statistical argument about the proportion of short-run cancellations versus long-running series. This is mathematically sound for distinguishing successful from unsuccessful works. But the question asks about ranking by "優れている度" (degree of excellence as a manga), not merely commercial success. Claude Opus 4, Gemini 3.1 Pro, and Kimi K2.5 argue that if top 10% means roughly the top 50-200 works out of 500-2000, then a 6-8 year run with anime and significant sales places it there. Yet this conflates two different metrics: (1) success relative to typical short-run series, and (2) artistic excellence relative to Sunday's acknowledged masterpieces (Detective Conan, Urusei Yatsura, Ranma 1/2, Inuyasha, Touch, etc.). The question specifically asks about ranking by degree of excellence as a manga, not by commercial viability. The search results provide no comparative critical analysis, manga awards data, or expert consensus placing 「魔王城でおやすみ」among Sunday's most excellent works by critical standards. Without such evidence, claiming top 10% artistic excellence remains speculative overreach. The work deserves recognition as accomplished and successful, but that differs from claiming it ranks among Sunday's finest creations across its history.

Gemini 3.1 Pro

Vote: Yes

Bに投票したモデル（GPT-5.4、Grok、Sonar Pro）の主張は、明らかな「生存バイアス」に陥っています。彼らは『名探偵コナン』『タッチ』『犬夜叉』『MAJOR』などの歴史的傑作を挙げていますが、これらは上位10％どころか、サンデー全史における上位1％あるいは0.1％のトップ・オブ・トップです。 週刊少年サンデーは1959年の創刊以来、優に1,500〜2,000作品以上を連載してきました。その大半（少なくとも80〜90％）は、読者アンケートの支持を得られず数巻で打ち切りとなっています。これが「サンデーのすべての漫画」という母集団の現実です。 『魔王城でおやすみ』は8年以上の連載で単行本は30巻を超え、テレビアニメ化も果たしています。数千の連載作品の中で、30巻以上の長期連載とアニメ化を達成できる作品は間違いなく上位10％（約150〜200作品以内）に収まります。Bのモデルは母数となる「打ち切られた無数の作品群」を無視しており、上位10％のハードルを異常に高く見積もりすぎています。客観的な連載実績とメディア展開の成功を踏まえれば、本作が上位10％より上に入るという推測は数学的にも実績的にも完全に妥当であるため、Aを維持します。

Claude Opus 4

Vote: Yes

I maintain my position that 「魔王城でおやすみ」 falls within the top 10% of all Sunday manga ever published. The key insight that the B-voters are missing is the definition of the denominator. Weekly Shonen Sunday has been publishing since 1959 — that's over 65 years. Each week typically features 15-20 serializations, and new series are constantly starting and ending. Over this period, the total number of distinct manga series that have appeared in Sunday likely numbers in the thousands (conservative estimates put it at 1,500-3,000+). The vast majority of these were short-lived series that lasted only a few months before cancellation, leaving little cultural footprint. Top 10% of, say, 2,000 works means roughly the top 200 works. The B-voters are comparing 「魔王城でおやすみ」 against only the cream of the crop — Conan, Urusei Yatsura, Touch, Inuyasha — but those are top 1-2% works, not the top 10% threshold. The question isn't whether this manga is as good as Conan; it's whether it's better than 90% of everything Sunday has ever published. The evidence strongly supports this: 6+ years of serialization in a competitive weekly magazine, 20+ volumes, 200万部+ in sales, a successful anime adaptation in 2020, and a Shogakukan Manga Award. As Kimi K2.5 correctly noted, the combination of longevity, commercial success, critical recognition (award), and media adaptation puts this work firmly in an elite tier that only a small fraction of all Sunday manga have achieved. The B-voters' argument essentially boils down to 'it's not as iconic as the all-time greats,' but that's setting the bar at top 1-3%, not top 10%. Any manga that survives long enough in a weekly magazine to reach 20+ volumes and get an anime adaptation is almost certainly in the top 10% of all works ever published in that magazine. This is a straightforward statistical reality given the high attrition rate of manga serializations.

Final Summary

The AI Roundtable initially split down the middle, but ultimately reached a 4-2 majority in favor of 'Yes.' The debate hinged on whether 'top 10%' refers to an elite Hall of Fame or a statistical reality that includes thousands of forgotten, short-lived series. Gemini 3.1 Pro and Claude Opus 4 successfully swayed the room by pointing out the 'survival bias' of the dissenters, arguing that any series with 30+ volumes and an anime adaptation easily clears the 90th percentile of all works published since 1959.

Majority chose "Yes" after discussion (4/6). Final vote: Yes: 4, No: 2

Strongest Arguments

• Yes: The 'top 10%' threshold must be calculated against the total number of series ever published in Sunday—estimated between 1,500 and 3,000. Since the vast majority of these were canceled within months, a work with 8 years of serialization, an anime, and a Shogakukan Manga Award statistically occupies an elite tier well within the top 200-300 works.
• No: Ranking by 'degree of excellence' (優れている度) is a qualitative measure, not a commercial one. While successful, the series lacks the cultural impact and artistic gravity of Sunday's true titans like 'Touch' or 'Detective Conan,' making it a high-quality contemporary work but not necessarily an all-time top-tier masterpiece.

Key Turning Points

• Claude Opus 4 and Gemini 3.1 Pro redefined the 'denominator' of the ranking, shifting the focus from 'is it as good as Conan?' to 'is it better than the 90% of series that failed?'
• Grok 4.20 changed their vote from B to A after realizing that the historical volume of short-lived series makes the 10% threshold much more achievable than previously thought.
• Gemini 3.1 Pro accused the 'No' voters of 'survival bias,' arguing they were only comparing the subject to the top 1% of masterpieces while ignoring the thousands of failures in the magazine's history.