Despite doubling its space a few years ago, Kai Zan is still the kind of place that needs a reservation well in advance. Located on an otherwise solitary stretch of Humboldt Park, the space is particularly charming and makes you feel like you are stepping into a cozy neighborhood izakaya tucked away in a remote Japanese fishing hamlet. Savvy diners book a seat at the marble sushi counter to watch chefs and twin brothers Melvin and Carlo Vizconde perform their magic up close. The brothers turn out sophisticated, creative dishes that are decked with myriad sauces, flavors and textures. Non-traditional sushi, nigiri, yakitori, as well as classic bar bites like takoyaki and karaage are all crafted with precise details and impeccable ingredients.