They are trying to solve a complex combinatorial optimization problem currently unsolvable by conventional computers in practical timeframe.
Fujitsu's research scientists are leveraging quantum algorithms on digital circuit-based architecture. Inspired by the quantum phenomena within silicon architectures, they have used conventional semiconductor technology to develop the quantum-inspired Digital Annealer.
I'd like to be very clear: this is not a quantum computer. It is built on classical hardware technology inspired by quantum phenomena to solve combinatorial optimization problems quickly, without the added costs and complexities that are typically associated with quantum computing.