(CNN) A man with strawberry-blonde hair squats to face his dark-bearded, well-toned opponent. Both are wearing black loincloths, and stand in a meticulously groomed circle, surrounded by ceramic tiles that link together to form a perimeter.

At the Mie Nishi complex, which opened in 1958 and also houses a baseball stadium, Brazilians come to train, wrestle and watch sumo. The wrestling arena was purpose-built and opened its doors in 1992.

In 2000, the Brazilian Sumo Confederation (CBS) was formed in So Paulo state, and the Brazilian National Championships, alongside the South American Championships, were held in the gymnasium.

With the aid of funding from the So Paulo Federation of Sumo, alongside a public fundraising campaign, the arena was refurbished in 2008, much to the delight of Brazil's Japanese population.

"At the time, the new gymnasium was considered to be the first and only exclusive sumo gym in the world outside Japan," says president of the gym Oscar Morio Tsuchiya. It's still the only one with a traditional clay ring, he says.

A crowded arena marks the opening of the refurbished sumo gym in 2008.

Courtesy Mie Nishi Gym

Every year since, the Brazilian Sumo Confederation has held major championships there, offering free admission to the public.

A championship was held at the opening in 2008 with around 400 athletes, including wrestlers from Japan.

The championships are now an annual event and, Tsuchiya says, the number of participants has been steadily increasing. He cites the local Japanese community as being "integral" to supporting the training of wrestlers and organizing the competition.

Brazil is home to the largest Japanese population outside Japan -- known as "Nikkei" -- with the last estimate in 2016 putting the number at 1.9 million.

In the Liberdade neighborhood of So Paulo, where more than half a million Japanese live, Shinto shrines line the streets, their traditional red torii gates framing the avenues in the district known as Little Tokyo.

"Before there was no permanent space for the practice of sumo here in So Paulo," Tsuchiya continues. "The championships were held in a makeshift manner in various places. Because of this, there were no children in So Paulo who could start practicing sumo, so [it was] only practiced by adults who trained in judo arenas."

Now, he says, the Brazilian community pull its weight by sending young wrestlers -- and women -- to the school to train.

'A source of pride'

Two opponents face each other during a training session in Mie Nishi gym.

Courtesy Mie Nishi Gym

There are around 30 members at the gym, many of whom travel for hours from small towns to come and train.

"The success of Brazilian sumo is certainly a source of pride for all those who, like us, work hard to maintain this sport," Tsuchiya beams.

Brazil now regularly sends wrestlers to national sumo championships, and one of the best sumo wrestlers outside Japan is Brazilian-born Ricardo Sugano, who goes by the name of Kaisei Ichir.

The third generation Brazilian-Japanese rikishi, or sumo wrestler, turned his back on his homeland's favorite pastime of soccer to study martial arts, which eventually led him to sumo.

Indeed, Sugano's training at the gym is a point of pride for Tsuchiya. When asked what some of his favorite memories have been so far, he lists "our dear Ricardo" and his debut at the gym as one of them.

Another wrestler, 25-year-old Rui Junior, drives eight hours to train at Mie Nishi. He's a 10-time Brazilian champion and a three-time South American champion, and recently competed in the World Sumo Championships in Osaka.

The Japanese government is so pleased with the spread of its sport to Latin America it even sent a coach to the gym to help train budding talent.

Unlike sumo in Japan, women are allowed to take part in the sport in Brazil, and it is growing in popularity among women and children.

Courtesy Mie Nishi Gym

However, there is one notable difference at the So Paulo arena: there are women wrestling.

In Japan, women have long been banned from entering, or even touching, the wrestling ring -- called dohy in Japanese. It is traditionally seen as a violation of the purity of the dohy, a view which critics say is based on the Shinto belief that women are "impure" because they menstruate.

But Tsuchiya says it was important to him to include females in the dohy ring.

"In order for Sumo to be recognized as an Olympic sport, it is also necessary to have the female sport, so the Brazilian Confederation created the female sport and started the first championship that included females in 2001."

And Tshuchiya has big dreams for the future, hoping that, some day, his humble gym in Brazil will host the World Championship.

In the meantime, the gym hosts tournaments once a month that are open to the public.

Ginsio de Sumo do Bom Retiro, Av. Pres. Castelo Branco, 5446 - Bom Retiro, So Paulo - SP, 01142-200, Brazil

Lucy Sherriff is a freelance multimedia journalist based in Bogot who covers environment, travel and gender issues.

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Facing off in the world's only traditional sumo ring outside Japan - CNN