# The Idolmaster SideM M-Fes 2026 in Winter Wonderland × DECOTTO by Animate Cafe
_アイドルマスター SideM Mフェス 2026 in Winter Wonderland × DECOTTO by animate cafe_

- **When:** Tue, Dec 1, 2026 – Tue, Jan 12, 2027 (JST)
- **Where:** DECOTTO by animate cafe, Toshima — animate Annex 1F, 3-2-1 Higashiikebukuro, Toshima-ku, Tokyo
- **Map:** https://www.google.com/maps/search/?api=1&query=35.7294972,139.7154636
- **Price:** price on the official site
- **Category:** Pop Culture & Conventions
- **Official site:** https://collabo-cafe.com/events/collabo/idolmaster-sidem-mfes-winter-decotto-2026-2027/
- **On Tokyo Events:** https://eventstokyo.com/en/events/sidem-m-2026-in-winter-wonderland-decotto-by-animate-cafe

![](https://collabo-cafe.com/wp-content/uploads/idolmaster-sidem-decotto-2026-keyvisual.jpg)

Featuring holiday-themed chibi versions of The Idolmaster SideM idols, the "M-Fes 2026 in Winter Wonderland" event offers special menu items and merchandise. Held at DECOTTO in Ikebukuro from December 1, 2026, to January 12, 2027.

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Source: Tokyo Events — https://eventstokyo.com/en/events/sidem-m-2026-in-winter-wonderland-decotto-by-animate-cafe