The are a group of the Japanese dialects spoken on Shikoku.
The Shikoku dialects are:
The Shikoku dialect has many similarities to the Chà «goku dialect group in grammar. Shikoku dialect uses ken for "because", and -yoru in progressive aspect and -toru or -choru in the perfect. Some people in Kà Âchi Prefecture use kin, kini, or ki instead of ken, -yà  (Hata) or -yà « (Tosa) instead of -yoru, and -chà  (Hata) or -chà « (Tosa) instead of -choru.
The largest difference between Shikoku dialect and Chà «goku dialect is in pitch accent. Except southwestern Ehime and western Kochi (yellow area on the right map), many dialects in Shikoku use the Kyoto-Osaka-type accent or its variations, and are similar to Kansai dialect, but Chà «goku dialect uses a Tokyo-type accent.
The differences between zi and di and between zu and du, which have been lost in standard Japanese, have been preserved in the southern part of the Shikoku dialect region.