千葉と茨城の「県境」が決まったヤバすぎる理由!?【ゆっくり解説】

Did you know that the Tone River, which flows along the border between Chiba and Ibaraki prefectures, actually emptied into Tokyo Bay until 400 years ago? Why did the Tone River drastically change its direction eastward...? We'll thoroughly explain this mystery from the perspectives of topography and history! 0:00 Opening 1:02 The Former Kanto Region and the Sea of ​​Katori 4:01 Problems Faced by Edo 6:21 60 Years of Major Construction 11:05 The River's Fangs 12:40 The Blessings Created by the Tone River 19:15 Ending ▼Recommended Videos ・10 Unique Japanese Prefectural Borders You Should Visit at Least Once    • 一度は行ってみたい日本のユニーク県境10選【ゆっくり解説】   ・[Japan's No. 1] Chiba Prefecture Has Too Many No. 1s!    • 【日本一】千葉県のNo.1多すぎ問題！【ゆっくり解説】   *Is the "worst attractive prefecture" claim a lie? A map showcasing Ibaraki Prefecture's number one attractions    • 魅力度ワーストはウソ？茨城県の日本一を集めた地図【ゆっくり解説】   ▼About the channel Look for the 'Chi.' icon 👀 We release videos every Tuesday at 8:00 PM! Short videos are also posted daily. To make sure you don't miss anything, please subscribe to the channel and turn on notifications by pressing the bell icon 🔔 in the upper right corner to see new videos immediately ↓↓    / @wakuwaku_geo_map   We would be truly happy if you support us!! ▼Wonderful materials we used as reference☆ Geospatial Information Authority of Japan HP https://www.gsi.go.jp/ #SlowExplanation #Geography #PrefecturalBorder