MAMAMOO fans holding tickets for 19 September in Jakarta have a clear answer, and it is not the one they wanted: the show is off, with no replacement date attached. Here is what RBW and the local promoter actually said, and what it means for the rest of the 4WARD run.
Is MAMAMOO's Jakarta concert cancelled or postponed?
It is cancelled outright, not postponed. Agency RBW and local promoter WithUs Indonesia jointly announced the cancellation of the Jakarta stop on MAMAMOO's 2026 WORLD TOUR "4WARD" on 11 September 2026, with no rescheduled date offered . The show was set for Saturday, 19 September 2026 at 18:30 WIB at NICE PIK 2 in North Jakarta, with the full four-member lineup of Solar, Moon Byul, Whee In and Hwa Sa .source
Quick Answer: MAMAMOO's 19 September 2026 Jakarta concert at NICE PIK 2 is cancelled, not postponed. RBW and promoter WithUs Indonesia announced it on 11 September — eight days before showtime — citing Anak Krakatau volcanic activity and tightened local safety measures. All purchased tickets receive a full refund.source
The timing is the part ticket-holders feel most. The announcement landed roughly eight days before showtime and nearly two months after tickets went on sale via FASTicket on 17 July 2026 at 10:00 WIB, capped at four per purchaser . RBW framed the decision as a safety call rather than a scheduling one.
"Placing the safety of the artists and audience first, we decided to cancel the concert after discussions with the local promoter," RBW said in its statement, adding: "We deeply apologize for the inconvenience and concern caused to the fans who were waiting for the concert, and ask for your kind understanding" (source: Khan Sports, 2026-09).
Indonesian coverage carried identical framing, citing keselamatan artis dan penonton sebagai prioritas utama — artist and audience safety as the top priority — and tying the call directly to the Anak Krakatau eruption . WithUs Indonesia's own notice used the same rationale and confirmed the detail missing from several early summaries: all purchased tickets will be fully refunded (WithUs Indonesia notice).
Why RBW cancelled: the Anak Krakatau eruption behind the decision
The decision traces back to a volcano roughly 150 km west of Jakarta. Anak Krakatau, in the Sunda Strait between Java and Sumatra, entered a continuous eruptive episode lasting about 25 hours — from Friday 4 September 2026 at 23:07 WIB until Sunday 6 September at 00:04 WIB . Indonesia's volcanology agency PVMBG kept the volcano at Level III ("Siaga") after the episode ended, warned that follow-up eruptions remained relatively likely, and maintained its recommendation that the public, tourists and climbers avoid all activity within a 3 km radius of the crater .
That status was not new. PVMBG had already raised Anak Krakatau from Level II (Waspada) to Level III on 2 July 2026 and set the aviation colour code to Orange, and both the alert level and the exclusion zone were still in force through the second week of September . Meteorological agency BMKG reported ash reaching roughly 20,000 feet east of the vent and about 50,000 feet to the west by 6 September, and ashfall reached populated areas including Jakarta and parts of West Java, prompting the city to order remote learning across all school levels from Monday 7 September . At least three further eruptions followed on the morning of 8 September .
The aviation impact was the largest single disruption. Ash forced closures at seven airports across Java and Sumatra — Soekarno-Hatta International, Halim Perdanakusuma, Husein Sastranegara, Pondok Cabe, Budiarto, Radin Inten II and Muhammad Taufiq Kiemas. On 7 September the Ministry of Transportation extended the closures until 23:59 WIB and counted 2,961 affected flights (2,339 domestic, 622 international) hitting roughly 341,000 passengers . Reopening was staged: Soekarno-Hatta, Halim Perdanakusuma and Husein Sastranegara resumed from 8 September at 00:01 WIB, followed by Budiarto and Pondok Cabe at 02:25 WIB, with BMKG confirming later that day that eight airports were operating again after paper-test checks returned negative for volcanic ash . Even then, normalisation was not immediate. "We ask for a little patience from passengers and the public, as we will be carrying out inspections to ensure that these aircraft are fit to fly," said Transport Minister Dudy Purwagandhi, quoted by Al Jazeera .
The sequence matters for reading the cancellation correctly. Airports had largely reopened by 8 September, three days before RBW called the show off on 11 September . The decision therefore does not rest on a live airport closure. It rests on residual risk with the volcano still at Level III, continuing aviation uncertainty for artist and crew movement, and the strengthened local safety and security measures applied to a large outdoor event scheduled eight days out at NICE PIK 2 in North Jakarta . For fans, the practical read is that the call was a planning judgement made under an active alert level, not a response to a single closed runway.
Refunds and ticket logistics: what Jakarta ticket-holders should do
Every ticket bought for the 19 September Jakarta show will be refunded in full. RBW and local promoter WithUs Indonesia (PT Harpa Ananta Sora) both confirmed a full refund on all purchased tickets in their 11 September notices, while stating that the refund mechanism, channels and schedule would be announced separately through WithUs Indonesia's social media and official website . Nothing needs to be filed yet — the operative instruction is to wait for the promoter's refund notice rather than act on secondary reports .
Tickets went on sale through FASTicket from 17 July 2026 at 10:00 WIB, capped at four per purchaser, across eight price points from VVIP standing down to CAT 5 . All published prices excluded a 10% government tax and a 5% ticketing platform fee .source
| Tier | Base price (IDR) | Notes |
|---|---|---|
| VVIP standing | 4,300,000 | Excludes 10% tax + 5% platform fee |
| VIP standing | 3,200,000 | Excludes 10% tax + 5% platform fee |
| CAT 1 | 2,600,000 | Seated |
| CAT 2 | 1,800,000 | Seated |
| CAT 3 (A / B / C) | 1,700,000 / 1,550,000 / 1,400,000 | Three sub-sections |
| CAT 4 | 1,250,000 | Seated |
| CAT 5 | 950,000 | Lowest published tier |
The event's standing terms describe tickets as non-refundable, non-exchangeable and non-cancellable unless officially announced otherwise . This cancellation is that stated exception, which is why a blanket refund is possible at all — buyers are not relying on goodwill but on a clause the promoter has now formally triggered.
Three points remain unresolved as of publication: whether the 10% tax and 5% platform fee are returned alongside the base price, whether refunds are processed automatically to the original payment method or require a claim submission, and how long the claim window stays open . Ticket-holders should monitor two places only: WithUs Indonesia's official channels — @withusind on Instagram and support@withusindonesia.com for customer service — and their original point of purchase on FASTicket . Travel and accommodation booked around the date sit outside the promoter's refund commitment entirely, and are a separate matter for airlines and hotels.
Not an isolated case: T.O.P's Jakarta event also fell on the same day
MAMAMOO was not the only K-pop act to lose a Jakarta date on 19 September 2026. TONZ Entertainment confirmed on 10 September 2026 that "T.O.P PRE-STUDIO 2026," the former BIGBANG member's event at Istora Senayan, would not go ahead, citing "local circumstances" without naming the volcano, with refunds processed through the LOKET ticketing platform .source
The two announcements landed roughly 24 hours apart — TONZ on 10 September, RBW on 11 September — for two separate events booked on the same Saturday in the same city . That pattern points away from an artist- or promoter-specific problem and toward a calendar-wide constraint: Anak Krakatau held at Level III ("Siaga") with an aviation colour code of Orange, a 3 km exclusion zone still in force, and PVMBG's warning that follow-up eruptions remained relatively likely .source
For fans tracking other Indonesian dates, the practical read is that promoters were making conservative calls a week or more out on large-capacity shows, rather than waiting for conditions on the day. Announcements have come through each event's own promoter channels rather than a single central source, so status for any given show has to be checked at its own point of purchase.
What's next for the 4WARD world tour
As of 12 September 2026, neither RBW nor WithUs Indonesia has announced a replacement Jakarta date, a move to a different venue, or a decision to drop the city from the 4WARD cycle . The cancellation notice committed only to refunds, so fans should treat Jakarta as removed from the schedule unless the promoter says otherwise rather than waiting on a rescheduling announcement that has not been signalled.
The rest of the tour is still listed as going ahead. The next confirmed stops are Melbourne's John Cain Arena on 22 September 2026, Sydney's TikTok Entertainment Centre on 25 September — the group's first shows in Australia — and Hong Kong's Kai Tak Arena on 4 October . That routing comes from a fan-compiled tour page rather than an RBW release, so treat the dates as indicative and confirm against each local promoter.
4WARD is MAMAMOO's second world tour, built around the special single album 4WARD and its title track "4 Flowers," which marked the first full-group reunion of Solar, Moon Byul, Whee In and Hwa Sa after roughly three years and eight months. The tour was announced on 30 October 2025 and expanded on 31 December 2025 to 26 cities across Asia, the US and Europe, with Jakarta added on 1 July 2026 .
The concrete takeaway: one of 26 cities has been cut, the remaining Australian and Hong Kong legs are unchanged, and the only action open to Jakarta ticket-holders right now is the refund process — not a wait for a new date.
Frequently asked questions
Was the MAMAMOO Jakarta concert cancelled or postponed?
Cancelled outright. RBW's announcement on 11 September 2026 and promoter WithUs Indonesia's notice both use the word "cancel," and no rescheduled date, relocation or replacement venue has been announced for the show that was set for 19 September 2026 at 18:30 WIB at NICE PIK 2 in North Jakarta . Ticket-holders should treat it as a removed stop rather than a delayed one .
Will fans get a refund for MAMAMOO Jakarta 4WARD tickets?
Yes. RBW and WithUs Indonesia have confirmed a full refund on all purchased tickets, which is the stated exception to the event site's standard non-refundable, non-exchangeable terms . The detailed refund mechanism, channels and schedule are to be announced separately through WithUs Indonesia's official website and social accounts, so buyers should follow the promoter and their original point of purchase — tickets were sold via FASTicket from 17 July 2026, capped at four per buyer — rather than secondary reports .
Why was the MAMAMOO Jakarta show cancelled?
RBW cited unpredictable circumstances stemming from recent volcanic activity in Indonesia and strengthened local safety and security measures. Anak Krakatau, in the Sunda Strait roughly 150 km west of Jakarta, erupted continuously for about 25 hours from 4 September 2026 at 23:07 WIB to 6 September at 00:04 WIB, and PVMBG kept it at Level III ("Siaga") with a 3 km exclusion zone around the crater afterwards . The agency said it decided to cancel after discussions with the local promoter, "placing the safety of the artists and audience first" .
Is the Jakarta cancellation linked to Indonesia's airport closures?
Only indirectly. Volcanic ash closed Soekarno-Hatta International and several other airports across Java and Sumatra, affecting 2,961 flights and about 341,000 passengers, but the Ministry of Transportation reopened Soekarno-Hatta, Halim Perdanakusuma and Husein Sastranegara from 8 September at 00:01 WIB . The cancellation came on 11 September, three days after airports were largely operating again, so the stated rationale is residual volcanic risk and event safety planning, not an active shutdown .
Are other stops on MAMAMOO's 4WARD tour affected?
No. As of publication, Jakarta is the only cancelled date on the 2026 WORLD TOUR "4WARD." The Australian leg — John Cain Arena in Melbourne on 22 September 2026 and the TikTok Entertainment Centre in Sydney on 25 September, the group's first shows in Australia — and Hong Kong's Kai Tak Arena date on 4 October remain scheduled . The tour covers 26 cities across Asia, the US and Europe, with Jakarta having been added on 1 July 2026 .
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This article was written using information collected and analyzed by NAMANE's in-house K-pop research AI engine. We use AI technology to bring you faster, broader coverage, and in the process some details may occasionally differ from the latest facts. For important information such as dates, venues, and prices, please double-check with official sources.
