WorkVenture gives you an inside look at what it's like to work at O.n.k. Jas Engineering Co., Ltd., office & team photos, reviews and more. This is the O.n.k. Jas Engineering Co., Ltd. Company Page. All content is posted anonymously by employees currently or previously working at O.n.k. Jas Engineering Co., Ltd..Apply to handywingsApply to Global CompassApply to GoWabiApply to WV