ニュース 日本政府、無料のマインクラフト東京地下マップを公開

日本政府、無料のマインクラフト東京地下マップを公開

著者 : Penelope アップデート : Jan 02,2026

日本政府は、世界最大の地下放水路施設のマイクラ世界マップを公開しました。無料ダウンロードが可能で、自宅にいながら東京エリアの卓越した工学的偉業の一つを探索できます。

正式名称を首都圏外郭放水路、一般にG-Cans(地下神殿)と呼ばれるこの施設は、防災において重要なインフラです。最も有名な区画は「調圧水槽」で、59本の巨大な柱に支えられた巨大な地下空間です。この荘厳な空間は、しばしば地下神殿に例えられ、劇的でほとんど映画のような質感を持っています。その独特の雰囲気から、ミュージックビデオや仮面ライダーなどの日本のテレビドラマ、映画の人気な撮影場所となっています。

実物のG-Cans。写真提供:Tomohiro Ohsumi/Bloomberg via Getty Images。

乾期にはG-Cansのガイドツアーが利用可能ですが、国土交通省は現在、マイクラを通じたバーチャルな代替手段を提供しています。同省は公式YouTubeチャンネルで、G-Cansの目的を説明し、ブロックで構成されたマイクラ版の様子を紹介する動画を公開しました。

無料のマイクラマップには、地下施設だけでなく、川、家屋、近隣地域を含む地上エリアも再現されており、G-Cansがどのように地域を洪水から守るのかをプレイヤーが理解するのに役立ちます。コントロールルームに入り、洪水を施設の立坑に排水するプロセスをシミュレーションして、システムがどのように作動するのかを確認することもできます。

マイクラ版G-Cans。画像提供:江戸川河川事務所。

国土交通省は、この施設の防災における重要な役割を一般に啓発するために、このマイクラレプリカを作成しました。仮想モデルを探索することで、構造物の途方もない規模感を強く実感できます。現実では、G-Cansは首都圏の埼玉県の地下を走る総延長6キロメートル以上のコンクリートトンネルで構成されています。その5つの巨大な立坑は、6月の梅雨時期と通常9月頃の台風シーズンに氾濫しやすい河川から水を集めます。この水はその後、より大きな江戸川や東京湾に徐々に放流されます。10年以上の建設期間を経て2006年に完成したG-Cansは、この地域の洪水被害軽減に貢献してきました。

G-Cansのマイクラマップは、施設を管理する機関である江戸川河川事務所の公式ウェブサイトから無料でダウンロードできます。マップを使用するには、少なくともMinecraft Bedrock Edition バージョン 1.21.1 または Minecraft Education Edition バージョン 1.21.0 が必要です。

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