[3] All Asa Line trains, rapid and local, stop at the station except for those which start or end their trips at Aki.

There is no station building but a shelter with both an enclosed and an open compartment has been set up on the platform.

A separate waiting room, toilet and bicycle shed have been set in the station forecourt where parking for cars is available.

[2][3][5] Each station on the Asa Line features a cartoon mascot character designed by Takashi Yanase, a local cartoonist from Kōchi Prefecture.

The mascot for Tōnohama Station is a figure dressed in the white pilgrim's garments and straw hat used by those on the Shikoku Pilgrimage.