Grammar - Beginner - Part 5
wo tooshite [o tooshite] を通して
Formal adverbial phrase meaning: through (some method)

1. After noun
私たちの調査を通して色々なことが分かってきた。
Watashi tachi no chousa o tooshite iroirona koto ga wakatte kita.
Through our investigation, various facts came to be known.

-> See also: ni yotte