With competition crowding out opportunities for growth in the Northeast, Connecticut’s two casinos are broadening their horizons overseas in search of new markets.

Mohegan Sun is seeking to operate in Japan and Foxwoods is opening a casino in Puerto Rico.

Oshidori International Development Godogaisha, a Japanese company established to develop a casino resort in Nagasaki, and Mohegan Gaming and Entertainment announced in late January a partnership for a joint bid for a resort license in Nagasaki.

“It’s one of the largest and most developed economies in the world and one of the last economies that does not have this particular entertainment,” said Mario Kontomerkos, chief executive officer of Mohegan Gaming and Entertainment.