Miroku values vary widely based on what model and when the gun was produced. The Miroku factory has produced guns for Browning, Winchester, Remington, and Charles Daly to name a few. You need to give more specific information to get a better answer.
The Miroku shotguns will typically bring 80% of the value of a Browning Citori in similar condition.
Charles Daly's current line of shotguns are manufactured by K.B.I. in Turkey: http://www.charlesdaly.com/faq.asp In the past, Charles Daly has sold shotguns manufactured by Miroku of Japan. But current production shotguns are Turkish.
Miroku was making shotguns for different firearms Companies before Browning came along. Charles Daly was one of their biggest customers for shotguns. More info is needed to determine which gun you have. This is not a Browning serial number.
50-100 USD
The value of your miroku will depend on grade and contition would range from about 750 to 1200
You will need to look in old gun catalogs, Blue Book of Gun Values, etc..
100-200 USD
I can't give you a clear answer if Miroku made the shotgun or not. However, may I offer a comment. Miroku has made shotguns for 150 years. From all I can gather, they are a high integrity organization and have made high quality guns for companies like Ithica, SKB,Weatherby,Charles Daly and Winchester. If you have a gun made by Miroku, I don't care what company has its name on it, you have a fine gun. Excellent design, fits and finishes. Durable and dependable. Sleek and good traditional looks. Good hunting.
700€
These high grade shotguns were made in Japan by Miroku in the year 1993.There were only 850 made.
The firm B.C. Miroku of Tokyo, Japan made the Charles Daly name of over and under shotguns from 1963 to 1976. Not a lot is known about this firearm, as retaining data apparently was not thought important when they were being sold. This shotgun has a value of around $700.
$1