この棚田は自宅から約100キロ離れた、標高約600ｍの広島県と島根県の県境に近い場所にあります。繋ぐ棚田遺産に登録されています。
20キロほど離れた奥出雲では約1400年前から明治初期まで「たたら製鉄」という製法で鉄を作っていました。たたら製鉄を国の選定保存技術として全国で唯一守り続けているのが、奥出雲の「日刀保たたら」です。
岩石や土に混じった砂鉄を川や水路の流れの破砕力を利用して土砂と分離させ、比重差によって砂鉄のみを取り出す方法を鉄穴流し（かんなながし）と呼び、山を削りました。その際、硬くて削れない花崗岩、鎮守の森、墓などは残しています。これを鉄穴残丘（かんなざんきゅう）と呼びます。奥出雲周辺には沢山あるようです。
今回は稲が黄金色に実ったタイミングで訪れましたが、四季を通じて景観を楽しめる場所です。
三河内棚田テラスは棚田を眺めるためだけに設置されています。テラスで座っている観光客に説明している人は「庄原DMO]の方達です。　shobara-dmo.jp/
今回の地主さんへの飛行許可、周知をしてくださった庄原市観光協会にも感謝いたします。
音楽：PeriTune　peritune.com/about/　Cnoc_Lore、音の園　oto-no-sono.com/　輪廻転生、水の巫女
撮影：Mavic3、Pocket3、LUMIX S5II
These rice terraces are located about 100km from my home, at an altitude of about 600m, near the border between Hiroshima and Shimane prefectures. They are registered as a Connecting Rice Terrace Heritage Site.
In Okuizumo, about 20km away, iron was made using a method called "Tatara Ironworks" from about 1,400 years ago until the early Meiji period. The only place in Japan that continues to preserve Tatara Ironworks as a nationally selected preserved technique is Okuizumo's "Nippotou Tatara".
The method of separating iron sand mixed with rocks and soil from the soil using the crushing force of the flow of rivers and waterways, and extracting only the iron sand due to the difference in specific gravity, is called Kanna Nagashi, and the mountain was carved. In the process, granite that is too hard to carve, shrine forests, graves, etc. are left intact. These are called Kanna Zankyu. There seem to be many of them around Okuizumo.
This time, I visited when the rice was golden yellow, but it is a place where you can enjoy the scenery throughout the four seasons.
The Mikawauchi Rice Terrace was set up just to view the rice terraces. The people explaining to the tourists sitting on the terrace are from Shobara DMO. shobara-dmo.jp/
We would also like to thank the Shobara City Tourism Association for giving the landowner permission to fly and for informing them.
Music: PeriTune peritune.com/about/ Cnoc_Lore, Oto no Sono oto-no-sono.com/ Rinne Tensei, Mizu no Miko
Photography: Mavic3, Pocket3, LUMIX S5II