Foreign Minister Masahiko Komura is considering visiting Havana as early as May as part of diplomatic efforts to improve the hitherto estranged relations between Japan and Cuba, government sources said Wednesday.

The sources said that If Komura visits Cuba he will be the first Japanese Cabinet minister to do so since Fidel Castro established a revolutionary regime in the Caribbean country four decades ago.

The sources also said that Cuban Foreign Minister Roberto Robaina Gonzalez will visit Tokyo from Feb. 22 to Feb. 27 at the invitation of the Japanese Foreign Ministry for talks with Komura and other Japanese government officials.