A fishing boat carrying the Chinese activists entered the water off the Diaoyu Islands at around 3 pm today.
The ship was then rammed in by a Japanese vessel and ran aground. The vessel was damaged by the collision, while people onboard including eight activists, two reporters and four crew members were not injured.
Activists managed to wade across the water and set foot on Diaoyu Islands and sung in chorus the national anthem to assert Chinese sovereignty over the Diaoyu Islands. It was also reported that the activists were likely under the arrest of the Japanese security authorites.
The fishing boat, which set sail Sunday, arrived within the reach of the Diaoyu Islands in the East China Sea Wednesday afternoon.
The group was hoping to reach the islands by late afternoon and go fishing as a way to assert China's claim to them. The boat was encircled by six Japanese government vessels, which were using water cannons and launched a helicopter in the maritime chase, said Chan, chairman of the Hong Kong-based Action Committee for Defending the Diaoyu Islands.
Chan had earlier said the chance of landing on the islands was not very good due to the Japanese intervention.
The activists were trying to land on the islands on the same day that Japan was marking the 67th anniversary of its World War II surrender.
China urged Japan to refrain from taking any action that could endanger Chinese citizens or their property, Foreign Ministry spokesman Qing Gang said in a press statement.