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"Yamiotoshi" is not a negative word, but rather a "period of stooping down to soar high" in which you find the necessary means to digest the frustration of everyday life and tune your mind.
"It's okay to have days when you're depressed!"
An idol group "Rough x Rough" produced by TV producer Nobuyuki Sakuma. It was named "rough x laugh" by combining "rough" which means rough and "rough" which means laughter. A 9-member female group that not only sings and dances, but also works hard on variety shows.