Metallica took to social media Wednesday to celebrate Japanese singer Ado's performances at Summer Sonic 2026, the annual Japanese music festival held across Tokyo and Osaka.

Ado performed "Enter Sandman" to open her Tokyo set on August 15 and close her Osaka set on August 16—a symmetry that caught Metallica's attention. The band posted: "Watching younger generations find their way to our music never gets old... it's one of the best parts of doing this. But we've never seen it done quite like Ado just did it. Opening AND closing Summer Sonic with 'Enter Sandman'?! We're blown away. Thank you!"

Ado responded minutes later, sharing Metallica's post with the caption: "This is huge! A message from Metallica?!?!?! I'm so happy!!!!"

The moment underscores how Western rock classics continue to reach new audiences through Japanese artists. Ado, known for her powerful vocals and anime tie-in work, has built a career connecting Japanese pop culture to global music, and her choice to bookend her festival performances with one of metal's most recognizable anthems demonstrates that appeal.

Summer Sonic itself has a long history of bridging musical worlds. The festival launched in 2000 at Fuji-Q Highland in Yamanashi and the WTC Open Air Stadium in Osaka, featuring acts like James Brown, Green Day, Weezer, and 311 alongside Japanese performers. By 2001, it had expanded to the Makuhari Messe convention center in Chiba and additional Osaka venues. Since 2002, the festival has anchored itself in the greater Tokyo Metropolitan area across Chiba and Osaka, becoming one of Japan's premier summer music events.

For Metallica, the interaction highlights how their music transcends generations and borders. Their recognition of Ado's artistry and interpretation of "Enter Sandman" signals respect for how younger artists are keeping classic rock alive—even when filtered through the lens of Japanese pop culture and performance styles.