San'nai (山内村, San'nai-mura) was a village located in Hiraka District, Akita Prefecture, Japan.
In 2003, the village had an estimated population of 4,364 and a density of 21.22 persons per km2. The total area was 205.68 km2.
On October 1, 2005, Sannai, along with the towns of Hiraka, Jūmonji, Masuda, Omonogawa and Ōmori; and the village of Taiyū (all from Hiraka District), was merged into the expanded city of Yokote.[1]
10月1日、横手市は、旧横手市平鹿郡の8市町村(横手市、増田町、平鹿町、雄物川町、大森町、十文字町、山内村、大雄村)が合併して一つになり、人口約10万人、面積693.04km2の秋田県第二の都市として誕生しました。