A‘miyaza' consists of several 'myo's. A 'myo'is a small religious association and it also means an association which possesses a certain area of farm field.
A myo，because of the possession of farm field，ceased to exist or changed its form，
according to the change of the farm field conditions. The historical materials tell us that there were miyazas in three villages，Tamari，Nomi，Uchibe in the eastern part of Aki district. In the 17th century，many 'myo's in this district ceased to exist，but the 'myo's of Tamari
continued to exist. The strongest reason is that the farm field didn't increase and the
facilities for water for farming were not improved，either. In the 18th century， almost all the 'myo's in the villages which were under the great influence of 'Shinshu' ceased to exits but the 'myo's of Tamari existed on account of the little influence of 'Shinshu'. The 'myo's of Tamari continued to exist till 1883 owing to the two reasons above mentioned.