【最深部】日本一低い国道の国道409号を全線走破

I was wondering, where is the "lowest national highway in Japan"? It was closer to me than I thought, so I decided to drive the entire route. The thumbnail is near the floating island, which wasn't visible properly in the video. First book: "The Mental Emergency Button of a Station Employee Who Gets Yelled at" https://t.co/Bg7IiTupPw Booklet sold at Winter Comiket: https://wataru-w.booth.pm/items/1765768 Twitter:   / wataru_w   Subchannel:    / @w_watanuki   Recommended videos:    • 綿貫渉のお薦め動画   BGM: Suzuhira:    / @suzu...   Dova Syndrome: https://dova-s.jp Maoudamashii: https://maou.audio Map data (C)Google