Singer Chiharu Matsuyama, 52, had to undergo emergency hospitalization on Wednesday morning. He was in the middle of a national tour that started last month, and the remaining 7 shows have now been canceled.

Matsuyama was scheduled to perform in the Mie prefecture on Friday. After attending an event on Tuesday in Fukuoka, he traveled to Mie late at night to prepare for the concert. Not long after he arrived, he collapsed in pain and was rushed to the hospital, where he was diagnosed with unstable angina. Doctors successfully performed an emergency angioplasty, but Matsuyama has to cut his tour short in order to properly recover.

The tour was scheduled to end on July 11 in Hokkaido.