Tokushima to Okayama - is UZUSHIO express covered by the JR pass?

Hi all

We are looking at possibilities to travel via JR trains from Tokushima to Okayama.
Found the UZUSHIO line. It offers two limited express trips, one in the morning (see details below) and one in the afternoon. Can we use our JR pass for this train/trip please?

08:23 → 10:33 (2h10min) UZUSHIO6
UZUSHIO
Tokushima → Okayama