After rights of the third party have accrued pursuant to the provisions of the preceding Article, the parties may not modify or extinguish those rights.
前条の規定により第三者の権利が発生した後は、当事者は、これを変更し、又は消滅させることができない。
If, after rights of the third party accrue pursuant to the provisions of the preceding Article, the obligor does not perform the obligation to the third party, the other party to the contract referred to in paragraph (1) of that Article may not cancel the contract without the consent of the third party.
Read this with the articles around it
(Third Party Beneficiary Contract)
If one of the parties promises in a contract to render a certain performance to a third party, the third party has the right to claim that performance directly from the obligor.
契約により当事者の一方が第三者に対してある給付をすることを約したときは、その第三者は、債務者に対して直接にその給付を請求する権利を有する。
Open this provision(Third Party Beneficiary Contract)
If one of the parties promises in a contract to render a certain performance to a third party, the third party has the right to claim that performance directly from the obligor.
契約により当事者の一方が第三者に対してある給付をすることを約したときは、その第三者は、債務者に対して直接にその給付を請求する権利を有する。
Open this provisioncancellation
解除
Ending a contract by one party's notice to the other, where the contract or the law gives that party a right to cancel (Civil Code, Article 540, paragraph (1)). The Civil Code lets a party cancel for the other's failure to perform: after a demand to perform within a reasonable time that is not met, unless what is still missing is minor (Article 541), or at once where performance has become wholly impossible, or the other party has clearly refused to perform, among other cases where performance clearly will not come (Article 542, paragraph (1)). On cancellation each party must put the other back in the position before the contract, and damages can still be claimed (Article 545, paragraphs (1) and (4)); a lease, though, ends only from then on (Article 620). Cancellation differs from rescission (取消し), after which the act is treated as void from the start (Article 121).
Written by AI using Civil Code, Arts. 121, 540, 541, 542, 545, 620 as a reference.