WE FORGOT TO APPLY FOR A VISA!!! HELLLLP! PLEASE!

HI WE ARE TAKING A CRUISE OUT OF TOKYO ON OCT 6. HOWEVER WE FLY INTO BEIJING TOMORROW OCTOBER 2 AND PLANNED TO VISIT SHANGHAI BY TRAIN STAY OVERNIGHT INTO SHANGHAI AND MAKE IT TO TOKYO OCT 5 BEFORE TAKING CRUISE OUT OF TOKYO. ONCE WE FINISH THE CRUISE WE WILL END IN SINGNAPORE BUT WOULD HAVE TO MAKE OUR WAY BACK INTO BEIJING TO FLY BACK HOME TO ATLANTA GA IN THE US ON OCT 26. WOULD WE QUALIFY FOR TWOV SINCE MOST OUR TRIP IN ON NORWEIGAN CRUISE FOR 16 DAYS? THANKS SO MUCH!