Unusual Hokkaido roller with Dots.
There are 4 dots on one side (2 on the barrel and 1 on each ear) and 2 dots on the other side (just 2 on the barrel).
'Dots' are typically found on 5 inch Tohoku rollers. This is a Hokkaido roller with Dots that were formed by the vent holes in the roller mold.
There are very distinct mold lines on this roller, too.
It's a standard size Hokkaido roller measuring about 5 3/4 inches in length.