Withup tungsten industry Co., Ltd. founded in 1951 merged Kaiyosha Co., Ltd. founded in 1928, and Withup Kaiyosha Co., Ltd. was established on February 1, 2016.

Withup Kaiyosha provides high-quality tungsten filament coils for various light source, such as conventional and halogen bulbs, for X-ray tubes and for electron guns. We can offer filaments beyond 60,000 kinds based on advanced coiling technique and long experience of the old two companies which succeeds. We offer light bulb related technical information and bulb parts at the same time.

We also challenge development of parts in the new industrial fields such as MEMS and medical treatments using experienced processing technology of precious metals and rare metals in particular.



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