- Japan says a Chinese surveillance plane violated its airspace on Monday.
- It's the first recorded incursion by China into Japan's airspace.
- Tensions are increasing between China and US allies in East Asia.
Japan on Monday said that a Chinese military plane violated its territorial airspace for the first time.
The Japanese government said a Chinese Y-9 reconnaissance plane had flown over the Danjo islands, west of the island of Kyushu, for around two minutes.