Yakiimo truck: Oonoya

A proper Tokyo winter classic: the roaming truck you find near stations when the air hurts your face. Oonoya is a stone-roasted yakiimo vendor, and they’re serious about variety. Their line-ups have included Beniharuka (sticky, honey-sweet, glossy), Silk Sweet (silky, smooth, lighter sweetness), Amahazuki (extra-high sugar, very sticky, dessert-level richness) and Kuri Kaguya (chestnut-like flavour, fluffy and a little drier rather than gooey). They roam mainly around southwest Tokyo and along certain rail lines, so follow their schedule on social media to make sure you catch them.