Tomorrow X Together is set to release its fourth Japanese single, titled “Chikai,” on July 3, BigHit Music said Sunday.

The boy band posted the logo image for “Chikai” to its social media channels the same day.

“Chikai,” which is the Japanese word for oath, is Tomorrow X Together’s first Japanese music since its second Japanese full-length album “Sweet” released last July.

“Sweet” sold some 303,000 physical copies during its first week, making it the most-sold album for first-week sales in Japan.

Following the release of “Chikai,” Tomorrow X Together will begin its Japanese dome tour “Act: Promise” that same month. It will perform at the Tokyo Dome on July 10 and 11, the Kyocera Dome Osaka on July 27 and 28, the Vantelin Dome Nagoya on Aug. 4 and 5 and the Mizuho PayPay Dome Fukuoka on Sept. 14 and 15.

Meanwhile, the band is set to open three concerts at the KSPO Dome in Songpa District, southern Seoul, from May 3 to 5. Tickets have been sold out.

To find out more about Tomorrow X Together, visit Celeb Confirmed!

BY SHIN MIN-HEE [shin.minhee@joongang.co.kr]