With a meaty agenda including global trade and geopolitical hotspots such as Iran and North Korea, the hosts are keen that world leaders are not caught short in the world-famous Japanese toilets. They are showcasing the latest in toilet technology and have shaved down the time to refill the cistern from one minute to 20 seconds for the busy world leaders - also reducing the water usage with the environment part of the G agenda.
Residents of Japan's second city are proud of their reputation for being straight-talking and having a wicked sense of humour, in contrast to the rest of the country which is often seen as shy, overly polite and cautious.
And to welcome the leaders, a local "idol" group of singers known as "Obachaaan" - whose members are women mostly in their 70s - released a rap video to showcase local attractions, delicacies and culture. Restaurants in the area are offering dishes with G themes. Certain restaurants are sprinkling takoyaki - a delicacy unique to Osaka that features fried pieces of chopped octopus in batter - with garnishes from G nations: caviar for Russia and BBQ sauce for the United States, for example, in an effort to appeal to some of the estimated 30, officials and journalists from around the world.
Even sex workers have decided to do their bit, volunteering to close all the area's brothel doors for the first time since the funeral of Emperor Hirohito. All establishments in the traditional red-light district of Tobita-Shinchi will stay closed during the global event, in a bid to offer a squeaky clean G image. Showcasing Osaka's best face is in the city's long-term interest as it prepares to host the Expo as well as attempts to woo an international casino to the area, said the association chief.
But if this somehow contributes to Osaka as a whole, it will bring benefits somewhere. I am sure of it," he said. Business will close during the summit on Friday and Saturday but already, establishments have lowered the white drapes to avoid any visitors taking offence at what lies within.
