(CNN) Less than 100 years ago, the Japanese Emperor was seen as a god in human form . But over the past three decades, Emperor Akihito has done everything to humanize himself.

He met his future wife, Michiko Shoda, at a tennis tournament and later became the first Japanese Emperor to marry someone outside of the aristocracy in the royal household's over 2,000-year history. When the couple had children, they became the first Japanese royals to raise them without help -- and reportedly even made their children pack their own school lunches

After Japan was hit by a deadly earthquake and tsunami in 2011, Emperor Akihito and Empress Michiko wore muted casual clothing to kneel beside survivors in a school gym -- something that would have been unheard of for previous emperors.

Newly crowned King Tupou VI and his wife, Queen Nanasipau'u, of Tonga proceed through the streets to the Royal Palace as part of the official coronation ceremony on July 4.

Newly crowned King Tupou VI and his wife, Queen Nanasipau'u, of Tonga proceed through the streets to the Royal Palace as part of the official coronation ceremony on July 4.

Crown Princess Victoria of Sweden attends the Nobel Prize Awards Ceremony at Concert Hall on December 10, 2014, in Stockholm. Princess Victoria is heir to the throne held by her father.

Crown Princess Victoria of Sweden attends the Nobel Prize Awards Ceremony at Concert Hall on December 10, 2014, in Stockholm. Princess Victoria is heir to the throne held by her father.

King of Sweden Carl XVI Gustaf and Queen Silvia attend the 2014 Nobel prize award ceremony at the Stockholm Concert Hall on December 10, 2014.

King of Sweden Carl XVI Gustaf and Queen Silvia attend the 2014 Nobel prize award ceremony at the Stockholm Concert Hall on December 10, 2014.

Mswati III was crowned Ngwenyama, or King, of Swaziland in 1986, when he was 18. He is shown here at the White House in 2014 with Inkhosikati, or Queen, LaMbikiza, one of his 15 wives.

Mswati III was crowned Ngwenyama, or King, of Swaziland in 1986, when he was 18. He is shown here at the White House in 2014 with Inkhosikati, or Queen, LaMbikiza, one of his 15 wives.

Qatar's Emir Sheikh Tamim bin Hamad Al-Thani took over leadership of the Persian Gulf nation in 2013 after the abdication of his father.

Qatar's Emir Sheikh Tamim bin Hamad Al-Thani took over leadership of the Persian Gulf nation in 2013 after the abdication of his father.

Crown Prince Haakon of Norway is shown here with his wife, Princess Mette-Marit; son, Prince Sverre Magnus; daughter, Princess Ingrid Alexandra; and stepson, Marius Borg Hoiby.

Crown Prince Haakon of Norway is shown here with his wife, Princess Mette-Marit; son, Prince Sverre Magnus; daughter, Princess Ingrid Alexandra; and stepson, Marius Borg Hoiby.

King Willem-Alexander, seen here with his wife, Queen Maxima, succeeded his mother on the throne of the Netherlands. His mother, Princess Beatrix, was Queen of the Netherlands from 1980 to 2013, when she abdicated.

King Willem-Alexander, seen here with his wife, Queen Maxima, succeeded his mother on the throne of the Netherlands. His mother, Princess Beatrix, was Queen of the Netherlands from 1980 to 2013, when she abdicated.

King Mohammed VI of Morocco sits with his wife, Princess Lalla Salma, at the royal palace on July 13, 2002, in Rabat, Morocco.

King Mohammed VI of Morocco sits with his wife, Princess Lalla Salma, at the royal palace on July 13, 2002, in Rabat, Morocco.

Princess Charlene of Monaco and Prince Albert II of Monaco welcomed twins Crown Prince Jacques Honore Rainier and Princess Gabriella Therese Marie in December 2014. The couple married in 2011. Prince Albert, Monaco's reigning monarch, is the son of Prince Rainier and Princess Grace, who was formerly known as Hollywood actress Grace Kelly.

Princess Charlene of Monaco and Prince Albert II of Monaco welcomed twins Crown Prince Jacques Honore Rainier and Princess Gabriella Therese Marie in December 2014. The couple married in 2011. Prince Albert, Monaco's reigning monarch, is the son of Prince Rainier and Princess Grace, who was formerly known as Hollywood actress Grace Kelly.

Monaco's newborn royals, Princess Gabriella and Crown Prince Jacques Honore Rainier, posed for their first official photos with their parents, Prince Albert and Princess Charlene. The twins were born on December 10, 2014.

Monaco's newborn royals, Princess Gabriella and Crown Prince Jacques Honore Rainier, posed for their first official photos with their parents, Prince Albert and Princess Charlene. The twins were born on December 10, 2014.

Grand Duke Henri and Grand Duchess Maria Teresa of Luxembourg married in 1981. The grand duke has reigned since 2000.

Grand Duke Henri and Grand Duchess Maria Teresa of Luxembourg married in 1981. The grand duke has reigned since 2000.

Prince Hans-Adam II of Liechtenstein and Princess Marie-Aglae married in 1967. The prince assumed the regency of the small European nation in 1989.

Prince Hans-Adam II of Liechtenstein and Princess Marie-Aglae married in 1967. The prince assumed the regency of the small European nation in 1989.

King Letsie III, seen here with Queen Masenate Mohato Seeiso, has twice become king of Lesotho -- first in 1990, when his father fled the country for five years, and again in 1996 after his father's death. Then-South African President Nelson Mandela spoke at the king's 1997 coronation.

King Letsie III, seen here with Queen Masenate Mohato Seeiso, has twice become king of Lesotho -- first in 1990, when his father fled the country for five years, and again in 1996 after his father's death. Then-South African President Nelson Mandela spoke at the king's 1997 coronation.

Prince Naruhito, seen here with his wife, Princess Masako, is heir to the imperial throne of Japan.

Prince Naruhito, seen here with his wife, Princess Masako, is heir to the imperial throne of Japan.

Japan's Emperor Akihito and Empress Michiko married in 1959. He became emperor in 1989.

Prince Frederik, seen here with his wife, Princess Mary, is the heir to the throne of Denmark.

Prince Frederik, seen here with his wife, Princess Mary, is the heir to the throne of Denmark.

Queen Margrethe II of Denmark, seen here with her husband, Henrik, Prince Consort, succeeded her father on the throne in 1972.

Cambodia's King Norodom Sihamoni succeeded his father, who had retired, in 2004. In the years before taking the throne, the king served as a professor of classical dance and artistic director of a ballet company, among other positions, according to his website

Brunei's Crown Prince Al-Muhtadee Billah Bolkiah and his new bride, Sarah, pray during their wedding banquet at the Nurul Iman Palace in Bandar Seri Begawan in September 2004.

Brunei's Crown Prince Al-Muhtadee Billah Bolkiah and his new bride, Sarah, pray during their wedding banquet at the Nurul Iman Palace in Bandar Seri Begawan in September 2004.

Brunei's Sultan Hassanal Bolkiah, one of the world's longest-reigning monarchs, salutes during a ceremonial guard of honor to mark his 68th birthday celebrations in Bandar Seri Begawan on August 14, 2014.

Brunei's Sultan Hassanal Bolkiah, one of the world's longest-reigning monarchs, salutes during a ceremonial guard of honor to mark his 68th birthday celebrations in Bandar Seri Begawan on August 14, 2014.

Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, Princess Charlotte of Cambridge and Prince George of Cambridge arrive at the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte of Cambridge in King's Lynn, England, on July 4.

Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, Princess Charlotte of Cambridge and Prince George of Cambridge arrive at the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte of Cambridge in King's Lynn, England, on July 4.

Charles, Prince of Wales and heir to the throne of Queen Elizabeth II, speaks to guests during a reception to celebrate the 21st anniversary of Duchy originals products at Clarence House on September 11, 2013, in London.

Charles, Prince of Wales and heir to the throne of Queen Elizabeth II, speaks to guests during a reception to celebrate the 21st anniversary of Duchy originals products at Clarence House on September 11, 2013, in London.

Britain's Prince Philip, Duke of Edinburgh, and Queen Elizabeth II have been married since 1947. Her coronation was held in June 1953 at Westminster Abbey.

Britain's Prince Philip, Duke of Edinburgh, and Queen Elizabeth II have been married since 1947. Her coronation was held in June 1953 at Westminster Abbey.

Bhutan's King Jigme Khesar Namgyel Wangchuck, shown here with his wife, Queen Jetsun Pema, is known as the "Dragon King." He became king of the South Asian country after his father abdicated in 2006.

Bhutan's King Jigme Khesar Namgyel Wangchuck, shown here with his wife, Queen Jetsun Pema, is known as the "Dragon King." He became king of the South Asian country after his father abdicated in 2006.

King Salman bin Abdulaziz al Saud succeeded one of his brothers, King Abdullah, on the throne of Saudi Arabia in January 2015.

King Salman bin Abdulaziz al Saud succeeded one of his brothers, King Abdullah, on the throne of Saudi Arabia in January 2015.

Now, Akihito will become first emperor in modern history to abdicate

As the soft-spoken "people's emperor" hands the title to his 59-year-old son, Naruhito, at the end of this month, he'll be remembered as a man prepared to break with traditions.

But Japan's leader is not alone in his desire to modernize the monarchy.

There are some 43 countries around the world with reigning monarchs. Some are working to update their image to win -- or maintain -- their public's approval.

For royals, figuring out how to stay relevant could be key to their survival.

While royals with absolute power don't have to answer to their public, those in a constitutional monarchy --- as in Japan or the United Kingdom -- could be legislated out of power if the tide turns against them. Although it would be an arduous, drawn-out process to remove the British royal family, for instance, it would less difficult for Commonwealth countries to become republics.

It's something that one country, at least, is talking about.

In Australia, opposition leader Bill Shorten has said that if his party wins the upcoming election, he'll hold a plebiscite on whether the country should become a republic. If they voted to become a republic, it would be the first step in a process to remove the Queen as head of state.

"Royal families across the world have to engage in a very delicate balancing act between tradition and modernity," said Boston University associate professor Arianne Chernock, who researches European monarchies. "If they stray too far one way or the other, they are imperiled."

Moving with the times

Royals have been engaging in the balancing act of trying to stay relevant while maintaining what makes them special for centuries, says Chernock. England's Queen Victoria, who ruled from 1837 to 1901, was initially concerned that photographs could make her too accessible, before realizing they could also help her to connect with her subjects.

Today, it is the UK's 34-year-old Prince Harry who is pushing the British monarchy to move with the times -- although he too has been trying to find the balance.

Meghan, Duchess of Sussex and Prince Harry, Duke of Sussex watch students play football in Asni, Morocco, on February 24, 2019.

As a teen, Harry was known for his partying ways

But he has matured and is embracing his role as an ambassador for the British royal family.

Known for his affable nature, Harry does his own grocery shopping -- and even took part in a pub quiz during his 2015 trip to New Zealand.

"We are involved in modernizing the British monarchy," Harry told Newsweek in 2017 . "We are not doing this for ourselves but for the greater good of the people."

Last year, Harry broke with tradition again by marrying Meghan Markle, a divorced, biracial American actress. At their wedding in the high-vaulted St George's Chapel at Windsor Castle, the head of the United States Episcopalian church, Michael Curry, gave a passionate sermon and a gospel choir performed, again breaking with tradition.

The prince has, however, said that it's hard to strike the balance between seeming "ordinary" -- i.e. relatable -- while maintaining the magic of the royal family.

Chernock said that when royals become too accessible, it can create problems. "Because then, where's the mystique, where's the allure, and why have taxpayers supporting this institution?"

Britain's young royals, however, seem to have got that balance right.

A January 2018 Ispos MORI poll of British adults named Harry and his brother, Prince William, as the most-liked royals. Harry's likeability had gone up dramatically since November 2012, while his father Prince Charles -- who is the heir to the throne -- had slipped down the ranks

Even his grandmother Queen Elizabeth II has been making changes. Last month, she shared a letter from the royal archives written by her great-great-great grandfather Prince Albert on Instagram

Turning tide

In Spain, the royal family's failure to update its image in line with modern public sentiment has turned resulted in no small amount of bad press.

In 2012, Spain's then-king, Juan Carlos, came under fire after pictures circulated of him standing in front of a dead elephant.

He had just been flown home for medical treatment after falling during a hunting trip in Botswana subsidized by a Syrian-born Saudi businessman. The Spanish public was not only furious about his apparent hunting trophies but the cost of the trip during an economic crisis.

It followed a string of other hunting scandals, including allegations that he'd shot a drunk Russian bear that had been given honey and vodka.

Following the controversial Botswana trip, opinion polls slipped to an all time low and 62% of Spaniards called for the abdication of the king, who had previously been extremely popular.

People carry an elephant figure during a demonstration against the Spanish Monarchy on September 28, 2013 in Madrid, Spain.

Carlos abdicated in 2014, but things didn't pick up for the Spanish royal family: In June last year, King Felipe's brother-in-law, Inaki Urdangarin, was jailed for fraud and tax evasion.

In December 2018, in an unofficial referendum in the Madrid region on the form of Spain's government, an overwhelming 93% said they would rather have a president than a king as the country's head of state.

The value of royals

Keeping a royal family is expensive, so monarchs need to show their worth.

In the United Kingdom, for example, British taxpayers paid the royal household £76.1 million ($100.5 million at the time) in the 2017-2018 financial year.

"The challenge for royals such as the Windsors (current royal family) is to convince the public that they're worth the money it takes to maintain and preserve them," said Flinders University's Bastin.

But monarchies can have real utility: They make money. In 2017 alone, the British monarchy generated £1.77 billion ($2.34 billion) for the UK economy according to the London-based business valuation and strategy consultancy Brand Finance.

Royals can also foster patriotism without having to engage in the dirty work of politics, said Chernock. Having a monarchy can be good for national identity, a positive for the United Kingdom as it deals with the divisive and drawn-out Brexit negotiations, she added.

Japan's Emperor Akihito, right, and Crown Prince Naruhito, left, wave to the crowd during the New Year's greeting ceremony at the Imperial Palace in Tokyo on January 2, 2019.

Although outgoing Emperor Akihito has made a point of staying away from politics, he has expressed "deep remorse " over Japan's actions during World War II. His sentiments contrast with those of Japanese Prime Minister Shinzo Abe, who has said that future generations should not have to keep apologizing for the country's past.

But he's shown no sign of wanting to return to the era of the demi-gods and every sign of being keen to follow in his father's footsteps when he ascends to the Japanese throne on May 1.

Naruhito married a non-royal, Masako Owado , in 1993.

He has already indicated that he will continue to speak out against revisionist history of WWII.

"I myself did not experience the war," he said on his 55th birthday in 2015. "But I think that it is important today, when memories of the war are fading, to look back humbly on the past and correctly pass on the tragic experiences and history Japan pursued from the generation which experienced the war to those without direct knowledge."

He has also said he'll build on his father's legacy.

"I want to earnestly fulfill my duties by always being close to the people, and sharing with them their joys and sorrows," he said at a press conference in February.

Ultimately, constitutional monarchies will only exist for as long as the public wishes them to be there, for as long as they capture the public's imagination, said Bastin.

"(Royals) aren't there in spite of us, but because of us," she said.