What is Hamster Hoodie?

Hamster Hoodie is the orange kigurumi worn by Umaru Doma in the 2015 anime Himouto! Umaru-chan!, which also became a fan art motif for drawing other characters in her lazy chibi form.

Where did Hamster Hoodie come from?

The design first appeared in Himouto! Umaru-chan!, and its hooded version went on sale as merchandise at Japan's CharaHoby 2015 CS x Hobby convention in July 2015.

What does Hamster Hoodie mean?

On Umaru, the hood signals her switch from honor student to junk-food-eating slob; Pixiv fan artists reuse the look to apply that same contrast to characters from other series.

How do you use Hamster Hoodie?

Fan artists draw a character wearing the hood surrounded by wrappers, a game controller, or manga volumes to mark them as a secret home slob, with a dedicated Pixiv tag opened on September 26, 2015.

Is Hamster Hoodie still popular?

The hoodie trend peaked in late 2015 as the anime aired, with Crunchyroll reporting convention sales of wearable versions within weeks of broadcast, and the costume is still tied to Umaru's character identity in anime fandom.

Hamster Hoodie

2015character design / fan art motifclassic

Published November 5, 2026

The hamster-shaped kigurumi hood worn by Umaru Doma in Himouto! Umaru-chan! became a staple of anime fan art after the series premiered in July 2015. Within months, Pixiv artists were drawing other characters in the same hood, and Amazon was listing wearable replicas by November.

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Overview

Hamster Hoodie, also known as Umaru's Kigurumi, is the orange one-piece hooded robe Umaru Doma puts on inside her apartment, printed with round hamster ears and a cartoon face3. The costume marks her "indoor" form, where she stops performing as a flawless high school student and reverts to a chibi who eats snacks, plays games, and reads manga in a pile of wrappers. On Pixiv, fan artists place the hood on characters from other series to turn them into the same slob-at-home chibi, usually drawn next to a game controller or empty snack packaging2. Comparisons get made to Hestia's boob ribbon from DanMachi, where both work as a single prop that marks a character and can be grafted onto unrelated heroines in the same way.

Gallery

Origin & Background

Platform

Himouto! Umaru-chan! anime (source) / Pixiv (fan art spread)

Creator

Unknown

Date

2015

Himouto! Umaru-chan! is a manga by Sankaku Head serialized in Shueisha's Weekly Young Jump, adapted into an anime by Doga Kobo that first aired on July 9, 20153. Viewers latched onto the moment Umaru shuts her apartment door and transforms into the chibi hamster-hooded form, and the hood became her visual signature within a week of broadcast. Crunchyroll reported on July 27, 2015 that a wearable version of the costume had gone on sale at the CharaHoby 2015 CS x Hobby convention in Japan, less than three weeks after the premiere1.

How It Spread

Pixiv artists opened a dedicated tag for chibi Umaru-styled fan art on September 26, 2015, which hit 45,642 views on October 23 and more than 140 tagged images by November 32. The main series tag passed 3,000 entries during the airing of the first season, with many of those featuring the hood specifically. Amazon's US store listed over 50 Umaru hoodie-related products by November 3, 2015, as cosplay sellers chased the demand from English-speaking fans4. Crunchyroll's earlier convention coverage had flagged the hood as the signature piece of Himouto! Umaru-chan! merchandise1. Across the late 2010s, the costume became a go-to for lazy-indoor fan art, and artists still reuse it on new characters whenever the "secretly a slob at home" joke comes up.

Timeline

2015-07-09

Doga Kobo's Himouto! Umaru-chan! anime premieres on Japanese TV, introducing Umaru's hamster-hooded indoor form.

2015-07-27

Crunchyroll reports that a wearable version of the hamster hoodie has gone on sale at the CharaHoby 2015 CS x Hobby convention in Japan.

2015-09-26

Pixiv users open a dedicated tag for chibi Umaru-styled fan art, where most posts feature the kigurumi.

2015-10-23

The Pixiv chibi Umaru tag peaks at 45,642 views.

2015-11-03

Pixiv tag has over 140 images and the main series tag is past 3,000 entries; Amazon lists over 50 Umaru hoodie-related products.

How to Use This Meme

Fan artists typically draw the subject wearing Umaru's orange hamster hood, scrunched into chibi proportions, and parked in a mess of junk-food wrappers with a game controller, manga volume, or snack in hand. Common conventions on Pixiv include replacing Umaru's blonde hair with the subject's own, keeping the hood's cartoon hamster face intact, and framing the character inside a cluttered apartment scene2.