In this paper I picked out Hiraga county in Akita prefecture and analyzed tenancy disputes about the rent managed by the Tenancy Mediation Law in Tohoku district. The analysis include tenancy disputes about the land restitution which are related to "the requirement of the rent reduction" or "the rent in arrears". The results are as follows. The first period (Syowa3(1928)-6(1931)): The movement of the tenant union was active in Akita prefecture during the Showa Crisis when the rice price fell. Many tenants performed "the requirement of the rent reduction" under the support of the union to maintain the fixed expenses for the reproduction. On the contrary, landlords coped with "the mediation of the rent claim". The second period (Syowa7(1932)-12(1937)): Tenants were faced with financial difficulties by the dissociation of the commodity price and the rice price from the first period and the yearly poor harvest. However, they could not perform "the requirement of the rent reduction" due to the declining union movement. Thus, tenants who operated less than 2 hectares could not help performing "the rent in arrears". On the contrary, landlords coped with "the mediation of the land restitution" if they could easily find the substitute tenant and coped with "the mediation of the rent claim" if not. The third period (Syowal3(1938)-15(1940)): Tenants continued to perform "the rent in arrears" as in the previous period. On the other hand, many upper-middle class tenants, who managed 2-3 hectares, performed "the requirement of the rent reduction" as well as "the mediation of the rent reduction by tenants themselves". They responded to the high price as their agricultural production cost .was higher than that of any other class and performed "the requirement of the rent reduction" to maintain self-wages which corresponded to the agricultural day laborer's wages. The outcome of the mediation was the highest in "the reduction of the rent in arrears" during every period and it was advantageous to tenants. But, it remained merely "the reduction of the rent in arrears". Unlike many collective tenancy disputes about the rent in Kinki district, collective tenancy contracts could not be realized at all. The degree of the scale and the depth of tenancy disputes brought about the difference between Kinki district and Tohoku district.