contract for (of) sale
土地の売買契約を交わすには実印が必要だ。
A registered personal seal is needed to conclude a land sales contract.
売買契約書に記名する前に内容を必ず確認すること。
Always check the contents before signing a sales contract.
不動産の売買契約では買主と売主が同席して手続きを進める。
In a real estate sales contract, the buyer and seller proceed with the formalities together.