日本戰國時代有個耐人尋味的謎題：最大、最堅固的城戰敗了；最小、最樸實的城卻兩次擊退大軍。
如果你問日本人，哪座城最大最堅固？大概答案會大同小異。如果你再問哪座城最會打仗，大概答案也一樣。但是在十年間，兩座城的結局完全不一樣，
這說明在亂世中：決斷和選擇導致的結果完全不同。
這部影片，把這兩座城放在一起看——小田原與上田。小田原城是後北條氏五代、約 100 年的關東霸權所在地。北條氏康時代擋住了上杉謙信與武田信玄，「難攻不落」四個字就是為它而生。為了對抗豐臣秀吉，北條氏甚至築起全長 9 公里的「總構」，把整座城下町變成一座城——是日本中世史上最大規模的城郭。
但 1590 年面對秀吉 20 萬大軍與「石垣山一夜城」的心理戰，城內開了一場 100 天無法達成結論的會議——這就是日文成語「小田原評定」的由來。
上田城則完全相反。1583 年由真田昌幸所築，方圓不到1公里。但它在 1585 年以 2 千兵擊退徳川 7 千、在 1600 年以 2500 兵絆住徳川秀忠 3 萬 8 千大軍，讓對方遲到關ヶ原。
決定真田家命運的不是城牆，而是合戰前夕在犬伏地方一夜密議所做的決斷——「犬伏之別」，父子兄弟分投東西兩軍，無論誰贏，真田家都能存續。
戰國時代的勝負，不在石牆的高度，而在判斷的速度。這部15分鐘的影片，帶你從東京一個週末走訪兩座城，看見日本歷史最戲劇性的十年——以及戰國時代真正的結局，是在哪裡寫下的
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Japan’s Sengoku era poses a puzzle worth thinking about: the largest, most fortified castle lost — while the smallest, most modest castle repelled major armies twice.
This video places those two castles side by side: Odawara and Ueda.
Odawara Castle was the seat of the Later Hōjō clan, who ruled the Kantō region for roughly 100 years across five generations. Under Hōjō Ujiyasu, the castle withstood attacks from both Uesugi Kenshin and Takeda Shingen — earning the legendary description “impregnable.” To prepare for Toyotomi Hideyoshi’s invasion, the Hōjō built a 9-kilometer outer earthwork called the Sōgamae, enclosing the entire castle town — the largest medieval fortress in Japanese history.
Yet in 1590, facing Hideyoshi’s 200,000-strong army and the psychological theater of Ishigakiyama “Castle of One Night,” the Hōjō council debated inside for 100 days without reaching a decision. From this came a Japanese idiom still in use today — “Odawara Hyōjō,” meaning a meeting that decides nothing.
Ueda Castle is the opposite story. Built in 1583 by Sanada Masayuki, it spans less than a kilometer across. Yet in 1585, with just 2,000 men, the Sanada defeated 7,000 Tokugawa troops. In 1600, with 2,500 defenders, they pinned down Tokugawa Hidetada’s 38,000-strong army — making him arrive too late for the Battle of Sekigahara.
What truly saved the Sanada family wasn’t the castle walls, but a single night of secret council at Inubushi — the “Parting at Inubushi,” when the father and his two sons split between the warring Eastern and Western armies, so the family would survive no matter which side won.
Victory in the Sengoku era was not measured in the height of stone walls — it was measured in the speed of judgment. In this 15-minute video, we take a weekend trip from Tokyo to visit both castles and witness Japan’s most dramatic decade — and where the true ending of the Sengoku era was actually written.
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