Apāto o kariru tame ni, ōyasan to chintai keiyaku o musubimashita.

In order to rent an apartment, I signed a lease agreement with the landlord.

Raigetsu, genzai no sumātofon to no keiyaku o kōshin suru yotei desu.

I plan to renew my current smartphone contract next month.

Keiyaku naiyō ni ihan ga atta tame, watashitachi wa keiyaku o kaijo suru koto ni shimashita.

Since there was a violation of the contract terms, we decided to terminate the contract.

Keiyaku o musubu mae ni, subete no jōkō o chūibuku yomu hitsuyō ga arimasu.

Before signing a contract, it is necessary to read all the clauses carefully.

Keiyaku kikan ga manryō shita tame, kono sābisu wa riyō dekinaku narimashita.

Since the contract period has expired, this service is no longer available.

Ryōsha wa, atarashii kyōdō purojekuto ni kansuru keiyaku o kawashimashita.

Both companies signed a contract regarding the new joint project.