Flight 1182 was en route to Toyama airport but headed back to the Sapporo-New Chitose airport after the crack was found on the outermost of four layers of windows surrounding the cockpit, the spokesperson said, adding there were no injuries reported among the 59 passengers and six crew.
The aircraft was not one of Boeing's 737 MAX 9 airplanes. These have been in the spotlight after a cabin panel broke off a new Alaska Airlines jet in mid-air last week.
"The crack was not something that affected the flight's control or pressurization," the ANA spokesperson said.
The United States aviation regulator on Friday extended the grounding of Boeing 737 MAX 9 airplanes indefinitely for new safety checks and announced it will tighten oversight of Boeing itself.