Jigs are required in every process in the factory. That is why the design and manufacturing of the jigs themselves cover a very important task. For example, in arranging the structure of a group of lenses, there is a difference, depending on the product, in how many ways it can be assembled together. This means that jigs have to correspond to these differences every time. Also, subtle adjustments are required in the process depending on whether the material is made from metal or resin. I have spent over 30 years working here but I am still learning to this day. I feel the need for this experience and knowledge I have cultivated to be passed down to the engineers and technicians of the future.