It's hard to think of February as springlike, what with snowfalls, freezing winds and a dusting of dead leaves everywhere. But I know from experience that the intrepid Prunus mume, or plum tree, blooms this month, and a trek to see some blossoms seems de rigueur. From the Tobu Isesaki Line, I get off at Higashi Mukojima Station to search out Hyakkaen, a garden that has showcased plum trees for centuries.