WorkVenture gives you an inside look at what it's like to work at R.k.diam Co., Ltd., office & team photos, reviews and more. This is the R.k.diam Co., Ltd. Company Page. All content is posted anonymously by employees currently or previously working at R.k.diam Co., Ltd..Apply to Virgin activeApply to NJSApply to DaishoApply to Tarali Spa