Home Location: 1880 Mendocino Ave D, Santa Rosa, CA 95401 Contact Ippinn Udon & Tempura: Tel: (707)521-9911 Business Hours: Mon: closed Sun-Thu: 11:00am-8:30pm Fri-Sat: 11:00am-9:00pm Online Order Location: 1985 Mendocino Avenue, Santa Rosa, CA 95401 Contact Ippinn Sushi & Ramen: Tel:(707) 800-7699 Business Hours: Mon: closed Sun-Thu: 11:00am-8:30pm Fri-Sat: 11:00am-9:00pm Online Order