[Problem] To provide a compound capable of effectively controlling important weeds of older leaves, which are practically problematic. [Constitution] A specific pyrazolyl pyrazole derivative represented by the formula (I) capable of solving the above-mentioned problems is disclosed. .【課題】実用上問題となる、より高葉齢の重要雑草を効果的に防除できる化合物の提供【構成】上記課題を解決できる式(I)で表される特定のピラゾリルピラゾール誘導体が開示される。