expression, godan verb (-su)
reach out; extend one's reach; set one's sights on
Idiomatic expression meaning to actively try to obtain or achieve something, often with a nuance of ambition or expansion. The literal image is of extending tentacles.
彼は海外市場に触手を伸ばしている。
He is reaching out to overseas markets.
あの会社は新たな事業分野に触手を伸ばそうとしている。
That company is trying to extend its reach into new business areas.