Shikakenin: Fujieda Baian(2016)

Shikakenin: Fujieda Baian

Set during the historic Edo period, the story centers on the titular Fujieda Baian, a medicine man and doctor by day, but ruthless killer for hire by night. His tools of the trade are the same in either job: acupuncture needles that leave no trace.

(Source: Anime News Network)