Karaji Miroku first operated as a blacksmith , creating parts and tools  for farming.

By 1893 he hadexpanded his business and established himself  as a gunsmith and gunmaker, producing a few handmade guns primarily for hunting boar and deer in the mountains near his home, Shikoku, Japan

In the 20th century Western manufacturing techniques were introduced in Japan. With the help of his son, Bukichi, the company was able to start producing small products and firearms. eventually growing and producing harpoon guns. However all production ceased upon the start of the the first world war.

Miroku struggling to restart after the end of the war and it was not until 1949 when harpoon guns became popular again that the company was able to thrive.  In 1952 Japan also lifted the manufacturing ban on sporting guns, this allowed Miroku to finally catch up with the western world.

In 1960, an production line in their factory began to manufacture their first over & under shotgun, there was approximately 300 workers on the line. By 1963 the company was exporting to America, New Zealand and Austrilia. However people were unsure and did not trust these new Japanese made guns.

Help eventually came came from an American brand ,the Charles Daly company. An agreement was made in 1963 the Miroku  over and under would be sold by Charles Daly for U.S. distribution. It was immediately recognized for its quality, good design, fine detailing, excellent fit and finish.

While Miroku continues to ever grow, their main competitor , Browning, was beginning to struggle. Their factories were striking and their costs were ever increasing. Browning began to see Miroku as a possible supplier.

After multiple meetings and factory visits to the Miroku factor, exchanges of design and technical expertise were in full swing by 1966. This began the strong relationship between Miroku and Browning, which has continued ever since