Fukui invited eyewear craftspeople from Osaka
According to the History of Fukui Prefecture, Gozaemon Masunaga brought technicians from Osaka in 1905 and laid the foundations of spectacle-frame manufacturing. This happened in Asozu village, now part of Fukui City. That starting point matters when tracing the eyewear cluster now associated with Sabae.
Fukui also had regional silk, washi paper and lacquerware industries at the time. Eyewear is one strand of the prefecture's broader manufacturing history.
Yamanashi expanded from crystal polishing
The Yamanashi Jewelry Museum says polishing skills arrived from Kyoto in the late Edo period. Priests at Kanazakura Shrine in northern Kofu were among those who learned them. The work later divided into crystal carving and gemstone polishing, growing into a cluster spanning material sourcing, processing, distribution and sales.
A craft that began with local crystal now includes many jewellery processes. That history does not mean every stone in today's products comes from Yamanashi. The source describes the growth of skills and work around Kofu, not the origin of each raw stone.
Several specialists make one product
Kofu City's industry and tourism plan describes local jewellery work from polishing, casting and processing to design and distribution. A Yamanashi Prefecture document also says division of labour is common. Stone polishers, metalworkers, designers and sellers all contribute to a finished piece.
The Kofu plan sees a similar culture of craftspeople, specialised processes and small manufacturers in Sabae. It says the two cities began cooperative projects in fiscal 2025. Clusters that once learned skills from elsewhere are now connecting across different products.
Skills concentrated across nearby workshops may help a craft centre endure. These sources document the arrival of techniques and the division of work, but they do not establish why each company chose its location or measure the economic effect of the cities' cooperation.