Quotes from the Associated Press:
"Japanese officials made the comments after Chinese fighters tailed its warplanes near the islands recently. The incident is believed to be the first scrambling of Chinese fighters since the tensions began to rise last spring."
"It was the first time the Chinese media has reported fighters being mobilized to respond to Japanese air force activity in the area and comes amid what Japan says is a rapid intensification of Chinese air force activity around the islands, where Japanese and Chinese coast guard ships have squared off for months."
"Every country has procedures for how to deal with a violation of its territory that continues after multiple cautionary measures," Japanese Defense Minister Itsunori Onodera said on Jan. 16 when asked if tracer shots would be fired against intruding aircraft that refuse to change course. "We have response measures ready that are consistent with global standards."