It is handmade and hand painted in underglaze blue with overglaze enamels.
This bowl is 17 cm in diameter. Namasu bowls sizes are between 15 and 20 cm. It is painted only inside the bowl. Outside there is a blue cobalt line around the bowl.
The inside image is hand painted - Imari style landscape. It presents blue and colourful clouds, bamboo and two birds on a branch.
It is marked: