The area of Tsubakimarai was a rural region of Tsukuba District of Hitachi Province noted as a major rice-growing region, with the exception of a small portion in the south, which belonged to Kitasōma District of Shimōsa Province.
The Tsubakimarai area was a rural zone in Tsukuba District of Hitachi Province, known as an important rice-growing region except for a small part in the south that belonged to Kitasōma District within Shimōsa Province.