Tourist groups from China, South Korea, and Taiwan, the three biggest sources of visitors to Japan, have scrapped trips to the quake-devastated Kyushu region and travel agencies are anticipating further cancellations.

The hit to tourism coincided with Japan’s peak spring travel season, with carriers including Korea’s Asiana Airlines Inc., Hong Kong Airlines Ltd. and China Airlines Ltd. canceling flights to Kumamoto after the southern prefecture was struck by a series of earthquakes since Thursday. The death toll has risen to 42 with more than a thousand people injured.

Hana Tour Services Inc., South Korea’s largest publicly traded tour agency, has canceled all its Kyushu tours up to April 22, and will waive charges for those who drop out until April 30, according to a spokesman. A branch of Beijing-based China International Travel Service Corp. has aborted Kyushu tours scheduled for April 21 and 29 and will offer refunds to those who cancel.

“Tourism will be hit not just for that area but there will be a spillover effect on the rest of Japan as well,” said Mariana Kou, an analyst at CLSA Ltd. “The average Chinese tourist won’t have a good knowledge of the geography of Japan, they will just feel that they should stay away from Japan for now.”

Japan had seen a rebound in tourism since a bigger earthquake which struck in 2011 and triggered a nuclear disaster. The travel boom has been a bright spot in an economy struggling to sustain growth, as the double-digit surge in visitors annually since 2011 boosted hotels, retailers and sales of everything from tour buses to contraceptives.

China tourists made up the largest group of visitors to Japan, accounting for 5 million of the record 19.7 million who went to the country last year, according to the Japan National Tourism Organization. South Koreans placed second with 4 million, followed by Taiwan, which sent 3.7 million. International Ltd., a Shanghai-based travel services website, and Taiwan’s Life Travel & Tourist Service Co. said in separate statements they are temporarily suspending tours to the Kyushu region.

At the 400-year-old Kumamoto Castle, ranked by Tripadvisor Inc. as number one on a list of things to do in the prefecture, parts of the surrounding stone walls and ornate tiered-towers have collapsed. Built in 1601 by a feudal warlord, the site is one of the most famous castles in the country, according to the Japan National Tourism Organization.

Standing near the castle on Sunday, Kumamoto resident Mitsuo Furuki mourned the damaged landmark.

“It would take so much time to be rebuilt,” said the 63-year-old. “I came here just a week ago — what I see now isn’t what I saw then.”

©2016 Bloomberg L.P.

This article was written by Rachel Chang and Monami Yui from Bloomberg and was legally licensed through the NewsCred publisher network.

Photo Credit: College students with their belongings wait for the arrival of a helicopter of the Japan Self-Defense Forces to be transferred to safer place in Minamiaso village, Kumamoto prefecture, Japan, Saturday, April 16, 2016. Hiroko Harima/Kyodo News / Associated Press