Singapore's sushi king dreams of opening a shop in an unlikely place as he looks to expand his huge chain of conveyor-belt sushi restaurants: Pyongyang.

Douglas Foo, 37, owner of Sakae Sushi, Singapore's largest sushi chain, would probably make most Japanese blush with his zeal to bring Japanese cuisine to unusual places like North Korea, but Foo sees the isolated country as an unexploited market with big potential.

"It's a market (where) you really get your first-mover advantage. There's almost no competition to speak of," said Foo, chief executive officer of Apex-Pal International Ltd., which operates the sushi chain.