Sachi was practicing on her o-koto when she learned that Japan had attacked Pearl Harbor. Here's an excerpt:
She knelt beside the long wooden harp on the floor of the dance room. Gently plucking its strings, she tried to mimic the music playing on the record album. After several minutes, her fingers began to throb. Mama said she needed to toughen them up, but today she didn’t feel like it. She lifted the needle and turned off the phonograph.
Maybe listening to a different kind of music would help. She turned on the radio and heard a saxophone blaring In the Mood. She giggled. How would that sound on the o-koto?
As the trombones entered the arrangement, a voice broke in:
"December 7th, 1941—a date which will live in infamy—the United States of America was suddenly and deliberately attacked by naval and air forces of the Empire of Japan..."
This is a video of the o-koto and how it is played: