Yoshioka-Kaitei Station (吉岡海底駅, Yoshioka-Kaitei-eki) was a railway station on the Kaikyo Line in Fukushima, Hokkaido, Japan, operated by Hokkaido Railway Company (JR Hokkaido). The station was underground and was located within the Seikan Tunnel under the Tsugaru Strait linking the main Japanese island of Honshu with the northern island of Hokkaido.