Japanese government spokesman expressed concern about Hong Kong situation after special zone people protested against security bill.

"It is important for Hong Kong to maintain the current open and free system within the framework of the 'one nation, two regimes' principle, as well as develop in a democratic and stable manner," Chanh Van

Suga said the Japanese government was "very concerned" about the situation in Hong Kong.

The statement was made by a Japanese government spokesman amid Hong Kong police today using tear gas to disperse hundreds of protesters in Causeway Bay and Central districts to protest the Chinese national anthem bill.

The Chinese national anthem bill is discussed for a second time today and is expected to be transformed into law next month, which requires "all individuals and organizations" to show respect and dignity with "Nghia".

The bill also requires the Chinese national anthem to be taught in schools and sung by organizations, as well as to impose imprisonment or fines for disrespectful acts.

Opponents say the bill is another example of Beijing "invading" Hong Kong, while supporters assert the city government's obligation to ensure national symbols are respected.

The protests took place in Hong Kong a few days after Hong Kong's security bill was submitted to China's parliament on May 22, prohibiting separatist, overthrowing, terrorism and other meddling activities.

Beijing asserted that the security bill would in fact reinforce the principle of "one country, two regimes", serving interests and supporting Hong Kong's development.

Thousands of Hong Kong people on May 24 took to the streets to protest the security bill, prompting police to use tear gas and water cannons to disperse crowds, evoking memories of protests that paralyzed the city.