Dengensha Mfg. Co. Ltd. Dengensha America’s parent company, merged with Nastoa Welding Technologies Co. Ltd., creating Dengensha Toa Co. Ltd. The new company will offer automotive, agricultural machinery and general manufacturers a complete line of resistance welding equipment with a product line that includes projection and spot stationary welders, capacitor discharge welders, weld guns, feeders, controls, transformers, consumables and spare parts. Dengensha Toa Co. Ltd. will also provide international training and support for the products.