The rift over the disputed territory continues to heat up, as a group of activists sail from Hong Kong for the uninhabited islands to assert China's sovereignty. Japan has reacted by announcing it will send ships to intercept the activists. Concerns are growing over whether the move will lead to confrontation.

Chanting "Japan out of the Diaoyu Islands", and with banners flying high, the boat carrying activists from Hong Kong, Macao and Shenzhen, set off in front of dozens of spectators.

It's the first time activists have left Hong Kong in an act of protest, following several attempts by the Hong Kong SAR government to bar it.

"According to their schedule, they'll arrive in Taiwan tomorrow visit the islands on the August 15th. "

If everything goes to plan, the date will coincide with the 67th anniversary of Japan's surrender to China during World War 2.

The activists say they'll reach the island before the arrival of over 50 Japanese government officials.

Ke Hua, Spokesman, Action committee on the Diaoyu Islands said, "We know some Japanese government officials will visit the island on August 19th. It only increases our determination. "

Japan is very concerned. According to its media, Japan's Coast Guards have stepped up patrols and will intercept the protesters' vessels.

Despite the potential dangers and confrontation, some experts from Hong Kong say it's worth a try.

Mon-Hung Lew, CPPCC member from HK said, "Grassroots organizations have united in this case. It's the voice of the people, and it will help our government if it's to negotiate with the Japanese government over the Diaoyu Islands issue."

Disputes over the Diaoyu Islands have been escalating since the Tokyo government announced its plan to buy the island last April.

Concerns are now growing that these troubled waters will see no sign of calm in the near future.