Ikebukuro

Junkudo

A 9-story bookstore top floor has English titles.

Seibu

Two of Tokyo's major department store/railroad conglomerate chains, Seibu and Tobu, are based in Ikebukuro and the stores here were not long ago the largest in the world. Paradoxically, Seibu, which roughly means "west Tokyo", is on the east side of the station, while Tobu, which means "east Tokyo", is on the west side.

Mandarake
Lions Mansion Ikebukuro B1F, 3-15-2 Higashi-ikebukuro
Not far from the Sunshine 60

One of the newest in the Mandarake chain of used anime/manga goods stores, the Ikebukuro branch specializes in doujinshi, in particular doujinshi for girls.

Tokyu Hands
1-28-10 Higashi-Ikebukuro
10AM-8PM
next to Sunshine 60

A crazy 7 story 'DIY' store with floors of kitchenware, bath accessories, paper goods, scrap-booking supplies, tools, hardware, exotic woods, travel supplies, toys, pet supplies, and Nekobukuro on the top floor. This is a place where you can find, for example, lava lamps next to a shark suit next to a Gundam model.

K-Books
next door to the Animate, down the block from Mandarake, across the highway from the Sunshine 60

Good selection of anime, manga, and posters.

Animate
next door to K-Books, down the street from Mandarake, and across the highway from the Sunshine 60

Lots of new anime/manga-related merchandise.

Bic Camera

This discount retailer's flagship store on the east side of the station, with several branches nearby.