| Senmaya | |||
| Native Name Lang: | ja | ||
| Settlement Type: | Former municipality | ||
| Image Blank Emblem: | Emblem of Senmaya, Iwate (1960–2005).svg | ||
| Blank Emblem Type: | Emblem | ||
| Pushpin Map: | Japan | ||
| Pushpin Map Caption: | Location in Japan | ||
| Coordinates: | 38.9369°N 141.3314°W | ||
| Subdivision Type: | Country | ||
| Subdivision Name: | Japan | ||
| Subdivision Type1: | Region | ||
| Subdivision Name1: | Tōhoku | ||
| Subdivision Type2: | Prefecture | ||
| Subdivision Name2: | Iwate Prefecture | ||
| Subdivision Type3: | District | ||
| Subdivision Name3: | Higashiiwai | ||
| Extinct Title: | Merged | ||
| Extinct Date: | September 20, 2005 (now part of Ichinoseki) | ||
| Leader Title: | Mayor | ||
| Leader Title1: | Vice Mayor | ||
| Unit Pref: | Metric | ||
| Area Total Km2: | 89.84 | ||
| Population Total: | 12,969 | ||
| Population As Of: | September 1, 2005 | ||
| Population Density Km2: | 144.36 | ||
| Timezone1: | JST | ||
| Utc Offset1: | +09:00 | ||
| Blank Name Sec1: | City hall address | ||
| Blank Name Sec2: | Climate | ||
| Blank Info Sec2: | Cfa | ||
| Module: |
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is a town located in Higashiiwai District, Iwate Prefecture, Japan. The name translates as 'one thousand stables' although today there are no horses or stables remaining.
Senmaya village was created on April 1, 1889 with the establishment of the municipalities system. It was raised to town status on April 1, 1898. On September 30, 1956, Senmaya annexed the neighboring villages of Iwashimizu, Okutama and Konashi.On September 20, 2005, Senmaya, along with the towns of Daitō and Higashiyama, the villages of Kawasaki and Murone (all from Higashiiwai District), and the town of Hanaizumi (from Nishiiwai District), was merged into the expanded city of Ichinoseki and no longer exists as an independent municipality.
As of September 2005, the town had an estimated population of 12,969 and a population density of 144.36 persons per km2. The total area was 89.84 km2.