01 / Oil field
Oil struck in 1913;718 wells were dug.

At the Toyokawa oil field, exploration began in 1882 and oil was struck in October 1913. At its peak it produced 86,800 kiloliters a year, and 718 wells were dug, making it one of the notable oil fields of Akita, a prefecture once called the kingdom of oil. It was recognized as a modern industrial heritage site in 2007, and the site of its cable-tool No. 1 well is a city historic site.
- Oil struck, October 1913
- 718 wells
- No. 1 well site: city historic site