Korean "comfort woman" Lee Yong-Soo, forced into sexual slavery serving Japan's war time imperial army, has been invited by US lawmaker Mike Honda to attend Japan Prime Minister Shinzo Abe's speech at US congress Wednesday.

"Grandma Lee is invited by Mr Honda to the joint session of Congress today. Mr Honda will join the rally this morning and escort her to the house chamber," said Sami Lauri, vice president of the Washington Coalition for Comfort Women Issues.