Chateau Lesage Yatsugatake no Tamago is a dessert shop on Theater Green Street, south of the east exit of Ikebukuro in Tokyo. It sells Japanese chestnut mont blanc soft serve, egg tarts, custard pudding, cream puffs, and apple pie. A single mont blanc or cream puff comes packed with an ice pack for takeout. You can eat it right away on the bench in front of the shop or in the nearby park.