Sankaku Channel/428

428: Fūsa Sareta Shibuya de (428 〜封鎖された渋谷で〜 Yonniihachi: Fūsa Sareta Shibuya de, literally "428: In a Blockaded Shibuya") is an adventure video game created by Kōichi Nakamura, developed by his company Chunsoft and published by Sega which was originally released in Japan for the Wii on December 4, 2008. The game was also ported by Spike to the PlayStation 3 and PlayStation Portable.

It is the basis for Canaan the anime.