traditional Japanese musical instrument
Refers to instruments such as 琴, 三味線, 尺八, 太鼓, etc., as opposed to Western instruments (洋楽器).
She is good at playing traditional Japanese musical instruments.
This shop sells traditional Japanese musical instruments.
Formed from 和, “Japanese,” and 楽器, “musical instrument.” 楽器 is read がっき, with the consonant gemination arising within that word.