I am a Singapore resident with an offshore bvi company. Income from my BVI company is this taxable?

I have a Singapore Company and a BVI Company. The services that I carry out in Japan are taken up in BVI company. But Singapore company signs the contract with my Japanese customers as agent for my BVI company. Will there be tax payable on the income from Japan that is paid to my BVI company? I think this is offshore services so should be tax-free?