よるところが大おおきい

expression, i-adjective

due largely to; depending largely on; playing a large role in

Used in the pattern ～によるところが大きい to indicate that something is largely attributable to or heavily influenced by the preceding noun or noun phrase.

• 彼かれの成せい功こうは努ど力りょくによるところが大おおきい。

  His success is largely due to his efforts.

• この問もん題だいの解かい決けつは技ぎ術じゅつの進しん歩ぽによるところが大おおきい。

  The solution to this problem depends largely on technological advances.