WorkVenture gives you an inside look at what it's like to work at Numsin Sinnum Plastic Co., Ltd., office & team photos, reviews and more. This is the Numsin Sinnum Plastic Co., Ltd. Company Page. All content is posted anonymously by employees currently or previously working at Numsin Sinnum Plastic Co., Ltd..Apply to Stellar HospitalityApply to 95 Studios 2018Apply to PaleoApply to Exim