In what year was the album “Kotonoha” released by 秦基博?

In what year was the album “Kotonoha” released by 秦基博?: The album “Kotonoha” was released in 2017 by 秦基博, featuring 4 tracks.
What is the most successful song from the album “Kotonoha” by 秦基博?: “言ノ葉” is the biggest hit from the album “Kotonoha” by 秦基博.

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