• Home
  • Business Activities

Business Activities


Dohitomi manufactures and sells fish hooks and other fishing tackles. For more than a century, we have been manufacturing the finest fish hooks in the world. Today Maruto and Maruto Eagle Wave is one of the best-selling hook brands worldwide.

  • manufactures more than 10,000 different hook patterns in our factory
  • exports 80% of its production to more than 100 countries
  • has an ability to produce 100 million hooks monthly
  • has an ability to manufacture hooks as thin as 0.20mm
  • is the first manufacturer in Japan to employ automatic fish hook machine and modernize the manufacturing process
  • boasts the highest quality based on latest technology developed in Japan
  • is always committed to researching new technology to meet the needs of our customers around the world


How to Manufacture Fish Hooks

Let us explain briefly how to manufacture fish hooks. 

When it comes to its production process, you are mistaken if you think fish hooks are an easy-to-make pretty simple stuff. Watch out! Looks can be deceiving. Actually, as you can see from the photos above and the flow chart below, it requires many machining processes and highly-skilled craftsmen, supported by technical expertise and craftsmanship that can be achieved only by a long years of experience. This provides Maruto fish hooks with the finest quality, which has been loved by anglers and fishermen around the world.


First, raw materials called wire rods, mainly made of steel, are cut to the length of a fish hook and the ends of the wire are tapered and sharpened to make the length of wire uniform.

Next, the wire is bent to be formed into a hook pattern. This process is called forming.

After the forming process, a fish hook is heated, tempered, and retempered in a heat treat furnace to make it harder.

The fish hook is then polished by using water and wood powder or is chemically sharpend. This is followed by surface treatment, namely either plating or coating to give a finish on the hook.

Finally, quality check is performed and fish hooks are weighed to count quantity. If necessary, the hooks are assembled or snelled to fishing line and are individually-packaged. After that, the hooks are packed into a carton and shipped to customers.

Page top

Copyright © 2009 Dohitomi co.,Ltd. All Right Reserved.