The above ground portion is operated by the private transportation company Nishi-Nippon Railroad (NNR), and has station number T02, and the underground portion is operated by the Fukuoka City Subway[1] The subway station's symbol mark is a mortar and pestle, because 薬院 means medicinal plant botanical garden in Japanese.

The station is served by the Nishitetsu Tenjin Ōmuta Line and is 0.8 kilometers from the starting point of the line at Nishitetsu Fukuoka (Tenjin) Station.

The subway station is one-floor underground, with an island platform on the second-floor underneath.

[2] During the same period, the Fukuoka Subway portion of the station was used by 9,528 passengers daily.

[3] Media related to Yakuin Station at Wikimedia Commons