WorkVenture gives you an inside look at what it's like to work at Summit Showa Manufacturing Co., Ltd., office & team photos, reviews and more. This is the Summit Showa Manufacturing Co., Ltd. Company Page. All content is posted anonymously by employees currently or previously working at Summit Showa Manufacturing Co., Ltd..Apply to Christian & NielsenApply to BTL MedicalApply to BertramApply to Vonic Corporation