Each year, Hokkaido's Tanaka Sake Brewing Kikkogura hosts the Otaru Umeshu Festival, which serves as a celebration of this much-loved beverage. Made from steeping unripe ume plums with sugar in alcohol, umeshu has a sweet, slightly sour taste, and can be found all across Japan from bars to convenience stores.
The Otaru Umeshu Festival allows visitors to participate in umeshu tastings, along with offering umeshu varieties for purchase. There's also some unique plum-inspired foods available at the event, including the likes of plum cheesecake, plum vinegar, and plum miso.