WorkVenture gives you an inside look at what it's like to work at S.j.a.management Co., Ltd., office & team photos, reviews and more. This is the S.j.a.management Co., Ltd. Company Page. All content is posted anonymously by employees currently or previously working at S.j.a.management Co., Ltd..Apply to Nippon PackagingApply to SiamentisApply to PassaApply to WorkVenture Technologies