Okinawa awamori flask

This dachibin, hip flask, is 6" long x 4.5" high x 3,5" wide and is signed on the back with a kiln/artist mark. It weighs 1 lb 2 ounces. The throat is rough so a cork would seal it nicely. It has a hand painted decoration on the top and front.

These flasks are generally a product of the Japanese island of Okinawa. They are used for drinking awamori, a rice liquor distilled there.

https://en.m.wikipedia.org/wiki/Awamori

I have been looking for an example for some time but waiting for one that is signed and not too expensive. This was a nice find which fills a hole in my collection. Possibly Tsuboya ware:

https://modernjapanesepotterymarks.blogspot.com/search/label/Tsuboya-Yaki

Maker uncertain. Similar example:

https://tinyurl.com/2ycevo4u