A combination of rain showers and tax prep in March signal Tokyo¡¯s segue into spring.

Cherry blossoms are nearly in bud, but cold, damp days of crunching fiscal figures can put people in dour moods. After wandering a wet backstreet, absorbing little more than precipitation, I throw in the towel and hail a green cab home.

The Tokyo Musen taxi driver zips with breathtaking alacrity to the curb to pick me up, and smiles charmingly as I climb in. I set about wiping rain off my cameras with a sigh, when suddenly the driver¡¯s hand appears between the front seats, bearing two little candies in bright yellow wrappers. I hesitate. ¡°Not your usual sweets,¡± the driver coaxes. ¡°They¡¯re sugar-free, vitamin-packed and taste great.¡±