闇雲 やみくも
yamikumo

Noun
na-Adjective

1. reckless; (at) random; haphazard; blind; sudden; abrupt

かれには教職 きょうしょく経験 けいけん かったが、やみくもにこの世界 せかい んだ。
kareniwa kyōshokuno kēkenga nakattaga yamikumoni kono sekaini tobikonda.
He'd had no experience of teaching, but he plunged in nonetheless.