noun
Taishō koto; Nagoya harp
A Japanese stringed instrument invented in the Taishō era, typically with 2–5 strings, played by pressing keys.
祖母は大正琴を習っています。
My grandmother is learning the Taishō koto.
From 大正 (Taishō era) + 琴 (koto, stringed instrument). Named after the era in which it was invented.