In America these would be bouillon spoons, I don't know what they would be used for in Japan but I suspect something similar.
They are marked on the back by the maker, so I hope you will be able to make it out from our photograph. Also there is a Japanese initial on the front decorated area.
These 6 are solid sterling silver and are 5.75 inches long and are beautifully made.
Weighing in at 6.12 ounces troy or 190.5 grams and are in excellent condition.