Opendoor, a U.S.-based online real estate marketplace, has announced a $400 million investment from SoftBank Vision Fund, the investment vehicle of Japan's SoftBank Group.

Opendoor also announced that it has also secured access to more than $2 billion in debt financing from top banks.

As it rapidly expands to new markets across the U.S., Opendoor will use the net proceeds to accelerate development of the technology platform to make it easier to buy, sell and trade-in homes with one seamless transaction.

SoftBank Investment Advisers will join the Opendoor board of directors.