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title: 東日本国際大昌平が3回戦進出、春夏通じて初 夏の甲子園
url: https://mainichi.jp/articles/20260813/k00/00m/050/205000c
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published_at: '2026-08-13T01:18:00Z'
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# 東日本国際大昌平が3回戦進出、春夏通じて初 夏の甲子園

## TL;DR
（要約なし・原文はリンク先を参照 / No summary available; see the source link.）

## Key Points
- world / 毎日新聞

## Details
(本文なし。リンク先参照)

## Source
元記事: [東日本国際大昌平が3回戦進出、春夏通じて初 夏の甲子園](https://mainichi.jp/articles/20260813/k00/00m/050/205000c) — published 2026-08-13T01:18:00Z