For the genuine denim build up to the genuine jeans, the vintage special sewing machine is also a indispensable essence. At the early development of the domestic jeans, huge amount of production equipment which had been used for making jeans in America such as "Union Special" was imported . However, in late 1970's, the latest domestic production equipments which could provide mass production became the mainstream replaced with the imported equipment. But, the domestic sewing machine has different structure with the vintage sewing machine, and for that reason, there are some differences which is a skew or a buckering around the chain stitched part. MOMOTARO JEANS in order to provide this vintage skew and buckering, gathering "Union Special Sewing Machine"which is exsistent in Japan, is producing real Jeans by the artisan to use them.