Koisan SushiSign up for our E-Club! Stay current on what’s going on at Orange’s favorite sushi bar.

We are pleased to present Koisan’s E-Club. Membership includes coupons, chances to win a monthly drawing, invitations to special occasions and other exciting events.

Please click on the link below to signup for E-Club. Your information will not be used for any other purposes nor will it be shared, sold or otherwise given to any other entity. In short – we will not add to your SPAM; but if you want regular updates and a chance to win gift cards for Koisan Sushi please sign up today!

E-Club Registration Form

Koisan Sushi Menu

lunch dinner sushi bar


  • Monday – Friday 11:30am – 2:00pm
    5:30pm – 9:30pm
  • Saturday 5:30pm – 9:30pm

Daily Specials

Ryu Suke Mizuno
The daily specials by chef Leo “Ryosuke” Mizuno, place Koisan Japanese Cuisine Restaurant above the rest. Koisan has inspired and pleased a loyal following of customers for nearly two decades.