ONEUS to Hold Japan Fan Concerts, Release Single 'Under'

ONEUS is bringing the heat to Japan this summer. The six-member K-pop group has announced a pair of fan concerts in Tokyo and Osaka, along with the release of a new Japanese single titled Under — a packed schedule that signals a confident new chapter for the group under their recently established home at BeWave Entertainment.

For the group's devoted fanbase, known as To Moon (투문), the news comes as a welcome and energizing development. After marking their seventh debut anniversary with a Seoul fan concert in March 2026, ONEUS is now turning their attention to Japan — a market where they have built a passionate and loyal following since debut in January 2019, through a combination of regular touring and music crafted specifically for that audience.

The Japan Fan Concert Lineup

ONEUS will hold two fan concerts under the title 2026 ONEUS FANCON: Welcome to ONEUS's ISLAND in JAPAN:

• June 27, 2026 — Tokyo International Forum Hall C, Tokyo
• July 5, 2026 — Nankai Namikirihall, Osaka

The two-city run marks ONEUS's return to Japan for a dedicated fan concert for the first time in approximately one year. Their previous Japan fan event, Between Earth and Moon Pt. 3, took place in May 2025, and the warm reception from Japanese fans at that concert has clearly set the stage for a return visit this summer.

The concert title — Welcome to ONEUS's ISLAND — continues the thematic identity the group has been cultivating. Fan concerts, as ONEUS has always approached them, are not just performances. They are gatherings: spaces built around direct connection with To Moon, with a more relaxed, personal atmosphere than a full production tour would typically allow. That intimacy is part of what makes these Japan dates special for fans who have been waiting to see the group again in a setting where the distance between artist and audience narrows significantly.

New Single 'Under' and What It Represents

Between the two concert dates arrives the release of ONEUS's new Japanese single Under, set to drop on July 1, 2026. The sequencing is thoughtful: the Tokyo concert comes first, the single drops a week later, and then the Osaka concert follows four days after that. Japanese fans attending the second show will carry the new music with them as they walk through the doors at Nankai Namikirihall.

Details about Under's sound and concept remain limited ahead of the official release. What is known is that the single follows the group's January 2026 Korean release 原 (Gen), which served as their first official statement under BeWave Entertainment. That single leaned into the raw, elemental energy ONEUS has always possessed — but with a new sense of momentum and direction that reflected the energy of their fresh start. Under appears set to extend that trajectory into the Japanese market.

Japanese releases have consistently been a meaningful part of ONEUS's career strategy. The group has invested seriously in the market, and that investment is reflected in the scale of the fan response they consistently receive during Japan activities. Under is the latest piece of that ongoing relationship.

A New Era Under BeWave Entertainment

ONEUS's transition from their previous label RBW Entertainment to BeWave Entertainment was announced in early 2026 and marked a significant turning point for the group. BeWave is a newer agency, led by CEO Gu Bo-yeong, who brings prior experience from both FNC Entertainment and RBW. At the time of signing, BeWave issued a statement pledging full support for ONEUS's activities across music, broadcasting, and live performance, with no limitations on creative direction.

That support is clearly materializing. The 2026 schedule — a Korean single in January, a debut-anniversary Seoul fan concert in March, Japan fan concerts and a new single this summer — represents a sustained, multi-front approach that reflects both the group's ambition and the label's commitment to backing it.

The seventh anniversary Seoul fan concert, held on March 21 and 22 at Kwangwoon University's Donghae Culture and Arts Hall, was a meaningful first act under the new agency. BeWave reported the two-night run as a success, describing it as a milestone that reinforced the bond between ONEUS and To Moon. The group has also kept fans engaged between major releases through their variety program, cover videos, and behind-the-scenes content — a consistent cadence of interaction that reflects how seriously ONEUS takes its relationship with its fanbase.

What To Moon Can Expect This Summer

The summer schedule is shaping up as one of ONEUS's most active stretches in recent years. For fans in Japan, the Tokyo and Osaka fan concerts represent exactly the kind of intimate, high-quality experience that generates the most lasting memories. Fan concerts offer something that arena tours often cannot: the sense that the group is genuinely present, speaking directly to the people in the room.

For the wider K-pop community watching ONEUS's trajectory, the summer activities continue a pattern of methodical, consistent growth. This is a group that has built its career through sustained quality and genuine connection with its audience, and the Japan concerts and Under single are the next steps in a plan that is clearly well in hand.

Ticket information for the Tokyo and Osaka shows is expected through official channels and BeWave Entertainment's announcements in the coming weeks. For Japanese fans, early access details are likely to follow soon. For To Moon around the world, the summer of 2026 is looking like exactly the kind of ONEUS moment worth planning around.

ONEUS's Seventh Year and Beyond

ONEUS debuted on January 9, 2019, under RBW Entertainment, and spent their first seven years building a fanbase known for its dedication and consistency. The members — Ravn, Seoho, Leedo, Keonhee, Hwanwoong, and Xion — have navigated the full range of K-pop experiences: breakout singles, chart milestones, military enlistments managed carefully around group activities, and now a new beginning under a label built around their needs.

That history matters because it is the foundation on which this summer's Japan activities rest. The Tokyo and Osaka concerts are not a group trying to establish themselves in a new market. They are ONEUS deepening a relationship that has been years in the making, with an audience that has followed their journey through every chapter. When the lights go up at Tokyo International Forum Hall C on June 27, it will feel less like a performance and more like a reunion — which is exactly what the best fan concerts are.