Given the task definition and input, reply with output. Given a sentence in the Indonesian(Bahasa variant), provide an equivalent translation in Japanese that retains the same meaning through the translation. In translation, keep numbers as it is.

Gou, menundukkan kepala sebagai ekspresi penyesalan, berjanji untuk berusaha menjaga agar tragedi seperti itu tidak akan terjadi lagi.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Gou氏は悔悟の表現として頭を下げながら、そのような悲劇が二度と起こらないようにすると約束した。