In the current world, without considering Haki or Devil Fruit abilities, it's a direct quantification of a combatant's attack power.
An average adult male, after some basic training in the Navy, has a Douriki Power of around 10.
Even the famous CP9 commander, Spadam, in Enies Lobby has a pitiful Douriki Power of only 9.
Within the Navy, Douriki Power is a reference value for measuring the strength of lower and middle-ranking Marines.
At the Marine Academy led by Zephyr, the Douriki Power test is also a key performance indicator for students.
The minimum entry requirement is 80 Douriki Power, while the minimum graduation requirement is 500, with no upper limit.
Of course, Douriki Power is only one of many graduation criteria; besides individual combat strength, other factors are also considered for graduation.
Soon, Zephyr led Yoriichi to an open space. Before Yoriichi stood a massive 5m x 5m x 5m stone wall, with a small display screen attached to its side, currently showing the number "0". Zephyr
walked to the wall, gently tapped it, and said to Yoriichi,
"Yoriichi, this is the 'instrument' for testing Douriki power."
"This stone wall is made entirely of Seastone, incredibly hard. When you attack it, the force transmitted is converted into Douriki power value and displayed on this screen."
"Look, like this."
As he spoke, Zephyr extended two fingers, as if knocking on a door, seemingly lightly tapping the wall. The massive stone wall emitted a muffled thud and visibly retreated several centimeters.
"Thump!!!"
With the sound, the value on the display screen beside Zephyr jumped wildly, finally settling at 1213 before stopping.
Zephyr seemed quite satisfied with his demonstration, a smile spreading across his face. Ten seconds after the displayed value finished, the massive stone wall slowly moved back to its previous position, as if spring-loaded.
Yoriichi was captivated by this novel scene; it was the first time he'd ever seen something that could directly measure attack power.
However, looking at the enormous stone wall, Yoriichi couldn't help but feel puzzled. Such a large wall couldn't possibly be moved by a normal person, could it? Zephyr
had only pushed the wall back a few centimeters, and the value only reached around 1200. An ordinary person wouldn't even be able to register a value, would they?
"Come on, Yoriichi, try it! Use your strongest attack!"
Zephyr smiled, pointing to the stone wall and gesturing for Yoriichi to step forward.
Full of curiosity, Yoriichi approached the stone wall, assumed a simple horse stance, and then unleashed a powerful punch, slamming it into the wall.
A tremendous force was poured onto the stone wall, yet it remained unmoved.
However, the number on the monitor next to Zephyr began to fluctuate, eventually settling at 520.
"Heh, is that all you've got?"
Zephyr said, looking at the number on the monitor, but his eyes were full of amusement as he looked at Yoriichi.
Just then, Yoriichi suddenly took a step back and drew his long sword from his waist.
"Whoosh~~"
Adjusting his breathing slightly, Yoriichi swung his sword directly at the stone wall. Crimson flames swirled around the black blade, casting a bright red glow on Yoriichi's face.
Sun Breathing—Third Form—Blazing Red Mirror!
"Clang!!!"
A horizontal slash, unlike the previous muffled sound, produced a crisp, metallic clang as Yoriichi's sword struck the seastone.
The massive stone wall visibly recoiled several meters before stopping.
At this moment, the number on the monitor next to Zephyr had jumped to 5333. Zephyr turned his head and, upon seeing the number, his expression clearly froze for a moment. However, the surprise vanished quickly, and Zephyr's face returned to calm as he said lightly,
"Hmm, so-so, not bad."
Although he said this and his face remained calm, Zephyr's heart was in turmoil.
What does a Douriki value of 5000+ mean? It's safe to say that most vice admirals in the Navy, without considering Devil Fruits, only reach the 2000-4000 range. Even excluding Garp, top vice admirals barely reach 5000.
Luffy's Gear Second during the Enies Lobby arc, if assessed by Douriki value, was only slightly over 5000. At that time, Luffy was already considered a great pirate, having defeated two Shichibukai and later being named one of the "Worst Generation."
Undoubtedly, a Douriki value of 5000+ is not something an unknown figure can achieve, even on the vast ocean.
But now, the fact that Garp had casually picked up a teenager who possessed such terrifying power was astonishing to Zephyr.
However, to maintain his "teacher" image, Zephyr remained outwardly calm.
"Yoriichi! You'd better train hard from now on." "
Your Douriki power is only a mere five thousand, you're still far from enough."
"When you can be like me, you'll barely be able to set sail and explore the seas."
As Zephyr spoke, he stood before the Sea Stone wall once more, took a deep breath, gathered his strength, and then suddenly punched the stone wall in front of him.
"Thump!!" After a muffled sound, the Sea Stone wall flew back several meters. The monitor next to Zeff stopped displaying at 7000 and turned into 00000 gibberish.
"Crack!" Just then, the flying stone wall seemed to reach its end, emitting a soft thud as it could no longer bear the weight. The device connecting the ground to the Sea Stone wall seemed to have broken, and the stone wall rolled further away.
"To shake this stone wall, you need at least 1000 units of power. Someone at my level is barely around 10,000 units."
"Kid, you're still far from it. From now on, train hard with me, and I'll train you into an excellent Marine."
Zephyr looked at the dumbfounded Yoriichi and said with a smile.
"Come on, I'll show you the rest. Starting tomorrow, I'll personally train you."
Then, Zephyr ignored the power testing device that he had already smashed and was smoking, and led Yoriichi away without looking back.
Not long after the two left, a marine academy instructor rushed over, looked at the messy ground, and remained silent for a long time.
For the entire day, Yoriichi followed Zephyr around, listening to Zephyr introduce the marine academy. Not only the school, but in the afternoon, Zephyr also took Yoriichi to tour Marineford.
Along the way, Zephyr encountered many acquaintances: old comrades, students, and admiring marine officers. Zephyr was in a particularly good mood today, greeting everyone he met and introducing Yoriichi to these old friends.
"Oh! jeff, you're back?"
"Ah! This kid? My new student."
"Strength? So-so. He only managed a little over 5000 points of Douriki on his first test. Still very green."
Yoriichi had forgotten how many people Zephyr had said the same thing to. While marveling at Zephyr's extensive network, Yoriichi also gained a general understanding of Marineford.
That evening, after a day of following Zephyr, Yoriichi returned home. He sat on the porch outside his house, leaning against a pillar, gazing at the night sky.
"The night sky in this world is even deeper than the previous one."
"The stars are even brighter!"