expression, godan verb (-u)
be on the same wavelength; think alike; get along
Metaphorical expression likening interpersonal harmony to matching radio wavelengths. Used for people who naturally understand each other or have similar ways of thinking.
彼とは波長が合うので、話がすぐに弾む。
We're on the same wavelength, so conversation flows easily.
新しい上司とはどうも波長が合わない。
I just don't seem to get along with the new boss.