Residents in Osaka are overwhelmed by the commotion the city has seen for the first time for a long time. 

Increased police patrols and security checks are causing traffic jams. Many shops and tourist locations have decided to shut down from as early as Thursday as road blocks and expressways are scheduled to be closed during the two-day conference starting Friday. 

Osaka is the third largest city in Japan with more than 2.7 million residents. 

However, the city's population is expected to grow by more than 60,000 during the summit. 

Leaders and representatives from 37 countries and organizations are expected to attend the summit, while 30,000 officials and members of the press are arriving day to day. 

The venue and routes where leaders are expected to travel will be patrolled by 32,000 police officers from all over Japan. 

Security has also been tightened to guard potential soft targets for terrorists. 

Police say they will also use radio jammers to prevent drone attacks on the venues. 

Security is said to be tighter than the G7 summit that was also held in Japan three years ago. Almost 10,000 more police officers have been deployed to Osaka. 

People are concerned that it will affect business. Many businesses and public facilities have already announced decision to close for the duration of the summit. 

Couriers either moved up or delayed delivery plans to avoid the possible traffic jams due to heightened security. 

The G20 meeting comes amid trade tensions between China and the United States, which put Japanese Prime Minister Shinzo Abe in an awkward position.  

Abe is in agreement with Chinese President Xi Jinping on promoting free trade, but his biggest ally, U.S. President Donald Trump, believes in protecting his country from trade imbalances. 

Trump on Monday issued new sanctions against Iran, fueling tensions in the Middle East. The U.S.-Iran tensions follow Abe's visit to Iran earlier this month. 

One item on Abe's agenda during the summit may be to seek closer diplomatic exchanges with President Xi. Abe hopes to start a shuttle diplomacy with Chinese leaders as the two countries are tightening bilateral and multilateral economic cooperation. 

(Cover: A police officer patrols at Kansai International Airport in Izumisano, near Osaka, ahead of the June 28-29 Group of 20 summit, June 24, 2019. /VCG Photo)