This bowl is produced by Nanraku-gama, No.1 mortar pottery studio in Japan, established in 1910.
It's well designed to hold and fits comfortably in your hand. Make dressing or/and sauce and place it directly on the table. It could be used to pour hot or formed milk to make a latte or cappuccino. A great bowl for natto lover, too.
height 3.3 inches (8.5cm)/diameter 4.0 inches (10.0cm)/width 5.5 inches(14.0cm) inc handle/weight 9.0 oz(255g)