Tokyo's star beautician Kiho Watanabe began Uka after the success of her six salons. The nail and hair oils are aimed at turning acts of otherwise mundane beauty maintenance into an addictive daily rituals. Her signature frosted vial features a spray nozzle for hair and a travel-ready rollerball for nails. Each nail oil is named for a time of day, while the hair oils are named for a weather-related mood or moment.