Ultra acosta 2026: Top 10 Cosplayers at Ikebukuro Sunshine City
Between September 4 and 6, 2026, the Tokyo Ikebukuro Sunshine City complex hosted Ultra acosta!2026, an expansive iteration of the regular acosta! cosplay event that drew a cumulative total of 24,000 participants across its three-day run. The gathering combined large-scale costuming exhibitions with night-time venue activations and open-air stage performances, drawing costumed performers and photographers despite heavy rainfall on the final day.
Expanding the Venue Footprint After Hours
The event kicked off on September 4 with a dedicated all-night gathering that secured a private buyout of the Sunshine Aquarium after regular closing hours. This unusual logistical setup allowed attendees access to exclusive photo backdrops unavailable during standard operating hours. Programming continued at the Sunshine City Fountain Square with “CDEF,” a stage showcase featuring team-based cosplay dance performances. On September 5, organizers introduced “acosta!マルシェ,” a concurrent marketplace dedicated to cosplay doujinshi and general flea market exchange.
Notable IP Representation Across Genres
While the convention floor featured a broad spectrum of costuming drawn from contemporary gaming, anime, and virtual YouTuber projects, specific titles dominated visual attention. Costumes referencing the theatrical anime release of “Puella Magi Madoka Magica” and the broadcast season’s prominent title “名探偵プリキュア！” appeared frequently throughout the exhibition spaces. Photography coverage across the grounds captured ten prominent character depictions, including:
- Daiwa Scarlet from “Umamusume: Pretty Derby,” portrayed by Mitamaru (X: @mitamaru_ksn)
- Agnes Tachyon from “Umamusume: Pretty Derby,” portrayed by Gumi Taberuu. (X: @gumi_taberuuu)
- Cheval Grand from “Umamusume: Pretty Derby,” portrayed by Riha Amase (X: @riha_amase)
- Black Swan from “Honkai: Star Rail,” portrayed by Koneko (X: @Nyan2_2zzz)
- Silver Wolf from “Honkai: Star Rail,” portrayed by Yoa (X: @yoizuki_yoa)
- Galbrena from “Wuthering Waves,” portrayed by Meari Tsukisaki (X: @eve_177cm173cm)
- Chisaki Kuchiba from “Wuthering Waves,” portrayed by Mitsuha (X: @_m_3030)
- Kuzuha from “Nijisanji,” portrayed by Nope (X: @7xr0S2)
- Fubashiro from “Nijisanji,” portrayed by Utena (X: @utena_tena)
- Ibrahim from “Nijisanji,” portrayed by Modoki (X: @modoki_cos)
All on-site photography for these featured appearances was managed by tama (X: @tama_0811_).
Logistical Realities of Weather and Scale
Operating a multi-venue pop culture convention involving thousands of attendees requires intricate schedule management and crowd control, particularly when incorporating unconventional spaces like closed aquariums and open-air plazas. While September 4 and 5 proceeded under standard late-summer conditions, the final day on September 6 brought persistent rainfall that forced organizers and participants to adapt outdoor shooting schedules. Despite these weather disruptions, the three-day aggregate attendance figures confirmed sustained interest in large-scale physical fandom gatherings within major commercial real estate hubs.
*Disclaimer: The views and cultural analyses presented in this article are for informational and entertainment purposes only. Information regarding legal disputes or financial data is based on available public records.*