Few sports can hold spectators spellbound through 45 minutes of ceremony before the initial score is even decided.
Yet the complex rituals unfolding in a traditional dohyĆ - virtually unchanged for centuries - accomplished exactly that.
This five-day event at the iconic London venue features 40 of the very best sumo athletes showcasing a sport whose first mention dates back to 23BC.
London's renowned auditorium has been completely reimagined, complete with a elaborate suspended canopy hanging above the competition area.
It is here the competitors, known as rikishi, perform their leg stomps to drive away evil spirits, and where they clap to summon the divine beings.
Above all this historical practice, a massive rotating display - that appears natural at an NBA match - offers the spectators all the data and video they could want.
For one dedicated fan, it was a "unexpected footage" that first captivated her a couple of years ago.
This was rapidly enhanced by the discovery of focused video platforms for training facilities, where athletes reside and practice, waking up early to practice, followed by a protein-rich meal and then an midday rest - all in the service of increasing mass.
Julia and her partner Cezar discovered sumo through a conventional method: a journey to Asia six years ago.
"We considered it a typical visitor experience, but we actually developed passion for the sport," says Julia.
"Subsequently, we tried to find communities, materials, just to learn more about it," adds Cezar.
Traveling to Asia is typically the sole method to see a major championship.
This week's event marks only the second instance the tournament has visited the city - the initial occasion was in the early nineties.
Even going to Japan isn't a guarantee of getting a seat, with the past period seeing fully attended competitions.
For numerous spectators, the current event represents the premier chance they have experienced the sport directly - and it doesn't disappoint.
"Seeing it up close, you get a feeling of velocity and the force which you can't experience on TV," notes one fan. "Their size is impressive."
To succeed, one wrestler needs to push another out of the ring or to the floor using physical force.
The most use one of pair of techniques to accomplish this, often in instantaneous actions - shoving, or clenching.
Either way, the noise of the two rikishi crashing together in the opening second of the match resounds around the venue.
The seats right next to the dohyĆ are of course greatly valued - but also, somewhat dangerous.
During one specific contest, a tall wrestler went plummeting into the audience - perhaps making those in more affordable locations breathe a sigh of relief.
Of course, the dimensions of the wrestlers is one of the first things most people consider when they consider the sport.
The facility's operators revealed they "needed to find and purchase additional seating which can support 200kg in weight."
But sumo - for all its successful competitions - is not without its challenges behind the scenes.
Perhaps the rigorous lifestyle of a sumo wrestler doesn't look as desirable as it once might have.
Its following among youth in Japan is also being challenged by other sports, while Japan's decreasing numbers will create further complications.
Not that any of this has worried fans in London.
"Witnessing these custom and formality that is part of sumo is quite special," an attendee explains. "Today, watching it directly, you feel like you are more part of it."
For other enthusiastic fans, the intensity "produced unforgettable moments" - as did meeting the like-minded individuals.
"Getting out of a highly specialized online community and being able to see all these sumo fans live and being able to chat with other people who are equally passionate as we are - it was worth every penny."
Lena is a passionate gamer and tech writer, specializing in indie games and esports coverage.