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Akagi
The Genius Who Descended Into Darkness
Case Summary
A ruthless mahjong prodigy whose dossier is built on discard-pool reading, psychological warfare, controlled cheating, forced-line strategy, and repeated high-pressure outsmarting.
Very strong realistic dossier candidate. The package is dense with direct tactical feats from Ryuzaki, Urabe, and Ichikawa material, though some source write-ups also contain explanatory reconstruction that was preserved with medium or contested confidence where appropriate.
Primary strengths: Psychological warfare, Mahjong deduction, Discard-pool analysis, Trap construction, Adaptive cheating counterplay
Feat entries: 122
Archive Note
This dossier was compiled primarily from Reddit-sourced material, so the current feat record may still be incomplete.
Because of that, a character can temporarily look weaker than they should in the leaderboard, battles, or radar profile if important feats have not been documented here yet.
The archive will keep improving over time as more feats, cleaner sourcing, and better scaling notes are added.
Radar profile
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Akagi Shigeru demonstrates exceptional strategic planning and deception, bolstered by strong reasoning and manipulation skills, as evidenced by his dossier. While his FSIQ and EQ are notable, they represent comparatively weaker lanes compared to his mastery of strategic and deceptive tactics.
FSIQ
8.6
EQ
8.8
Strategy & Planning
9.4
Reasoning
9.3
Manipulation
8.9
Deception
9.6
Community signal
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Evidence Ledger
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Quick Access
Category
Planning archive records.
Akagi offers the direct solution of reducing both score totals to one-tenth so the fight can end in a shorter and more actionable window.
Source: Ichikawa Strategy / Reduction
Akagi repeats the fast-pressure approach in the next round because he wants more confirmation that Urabe's caution under pressure is habitual rather than incidental.
Source: Urabe Strategy
When the wrong hidden tile is exposed for a second and everyone sees North, Akagi later builds an entire trap around the fact that this information is now in everyone else's model.
Source: Urabe Strategy / Akagi : Urabe Arc
Akagi makes Osamu play first so Urabe can be studied through a weaker and less controlled test subject before Akagi commits himself.
Source: Urabe Strategy
Once he believes Urabe also holds one, Akagi preserves the 2 pin specifically so Urabe's eventual discard of the matching tile can become the direct finishing Ron.
Source: Urabe Strategy
The source explicitly frames the 8000-point loss as Akagi buying a specific later timing window for the elimination strategy he intends to use against Urabe.
Source: Urabe Strategy
Akagi specifically discards 5 sou after the Kan so that an experienced defender like Urabe can interpret the nearby 4 sou as potentially serving a head role in Akagi's hidden structure.
Source: Urabe Strategy
Akagi specifically picks Xia because three copies are already visible, because honor tiles only form pairs or triplets, and because a rational blind defender like Ichikawa will strongly tend to hoard such a seemingly safe tile.
Source: Ichikawa Strategy / Reduction
Akagi times the last trap around the moment Ichikawa acquires Pei, because Pei is the tile that creates the Kan fear and the follow-up countermeasure route.
Source: Ichikawa Strategy / final round
As the round continues, Akagi repeatedly passes on lower-value winning lines because his main objective is still to deepen Urabe's confusion and miracle-image.
Source: Urabe Strategy
Akagi has the gang avoid telling Osamu the real stakes so Osamu's natural decisions can be observed before panic contaminates the sample.
Source: Urabe Strategy
Akagi reaches a very fast Riichi in the first direct round mainly to watch how Urabe reacts under immediate ready-hand pressure.
Source: Urabe Strategy
Akagi sees that he cannot rush a direct final duel from the opening deficit and should first farm the two weaker support players for safer score recovery.
Source: Ichikawa Strategy / Revival
Category
Deception archive records.
Akagi intentionally makes the hand look like a simple, cheap Riichi line so Urabe limits the threat model and starts anchoring on Dora-related danger instead of the broader picture.
Source: Urabe Strategy
Akagi engineers the position so Urabe concludes North cannot plausibly still be in Akagi's hand and therefore becomes a rationally safe discard candidate.
Source: Urabe Strategy
Akagi's prior calling pattern makes it look as if he may have abandoned a Sancokudoujyun structure, which in turn makes Urabe fear additional tiles that could still secretly connect to that shape.
Source: Urabe Strategy
Akagi calls manzu in a way that makes it look like he is pursuing a Honitsu and therefore a high-scoring hand, pushing the side players into tighter defensive behavior.
Source: Ichikawa Strategy / Revival
By calling around 1s and 9s as well, Akagi gives the players another expensive-hand hypothesis to fear instead of one clean read.
Source: Ichikawa Strategy / Revival
Akagi opens with two Chi sequences that make the hand look like a simple 3 Shoku Doujun line, narrowing Ichikawa's attention toward Dora math rather than the hidden trap.
Source: Ichikawa Strategy / final round
Akagi irrationally throws Haku earlier precisely so Ichikawa will build the assumption that Akagi has no Haku, making a later Chun indicator look safe to manipulate.
Source: Ichikawa Strategy / final round
Because the Riichi comes so quickly, Urabe is forced to react before receiving much useful information about how Akagi normally constructs or discards.
Source: Urabe Strategy
Akagi says Urabe will hand him the tile he needs and even leaves the table, weaponizing the already inflated mystery around himself to intensify Urabe's overthinking.
Source: Urabe Strategy
Once the other 2 pin tiles are gone, Akagi discards the 2 pin he was holding so it looks like he has finally given up on secret pinzu plans.
Source: Ichikawa Strategy / Attack on Ichikawa
With a terrible hand and serious risk, Akagi makes irrational-seeming discards such as 4 man and 5 man to imply a Kokushi Musou path and force Ichikawa to take that possibility seriously.
Source: Ichikawa Strategy
Akagi participates in the false story that he is Nangou's nephew and not the runaway survivor the detective is seeking.
Source: Akagi Shigeru Document feat
Akagi then discards Pei in a way that suggests he has now reached Kokushi Tenpai and no longer needs the usual safe honor tile reserve.
Source: Ichikawa Strategy
When the left player points out that Akagi's Chi line is invalid, Akagi uses the natural act of returning the tile as cover to get his hand into the discard area without attracting suspicion.
Source: Ichikawa Strategy / Reduction
Akagi extends the fabricated story by claiming the rainy footprints came from a late cigarette errand and that the stores were closed, giving the detective a plausible explanation for the physical evidence.
Source: Akagi Shigeru Document feat
Once the alibi takes hold, Akagi pushes everyone back toward the mahjong game so the room's attention is split away from scrutinizing him further.
Source: Akagi Shigeru Document feat
Akagi consistently discards tiles near the 2 pin so that, from Urabe's point of view, 2 pin becomes the one tile that feels too exposed and too ordinary to be the real trap.
Source: Urabe Strategy
Akagi discards Chun but pushes another tile forward in the two-row pond so it looks like he discarded Xia instead, allowing the fake safe discard to pass.
Source: Ichikawa Strategy / Revival
During the correction motion, Akagi replaces a 9 man in his hand with a Xia from the left player's discard pool to create the later impossible tile state.
Source: Ichikawa Strategy / Reduction
Category
Manipulation archive records.
When Nangou fears the discard, Akagi gives him only a sly look and smile, and Nangou immediately understands and complies without Akagi verbally explaining the move.
Source: Akagi Shigeru Document feat
The fear Akagi creates indirectly produces disagreement inside the enemy side over whether Yagi should be called, which Ryuzaki treats as an insult to their pride.
Source: Akagi Shigeru Document feat
Akagi's open hand threatens both a miracle-grade path and a merely strong path, and Urabe is manipulated into discarding toward the cheaper one just to break the possibility of the stronger one.
Source: Urabe Strategy
Ichikawa accepts the implied duel structure and starts discarding pinzu that were already forming patterns, confirming that Akagi's message landed.
Source: Ichikawa Strategy / Attack on Ichikawa
Faced with even a small chance that Akagi's Kokushi line is real, Ichikawa chooses the rational safe branch of giving another player a Ron to end the round instead of letting Akagi continue.
Source: Ichikawa Strategy
Because Ichikawa thinks Akagi has no Haku, he chooses Chun as the indicator, which turns Haku into Dora and directly strengthens the hand Akagi was hiding.
Source: Ichikawa Strategy / final round
Akagi leverages Nangou's need to survive the room and offers to reshape all of his tiles into the Dai San Gen and Su Ankou route in exchange for a story, alibi, and identification cover.
Source: Akagi Shigeru Document feat
When Akagi finally enters, he tells Urabe that the pressure now rests more heavily on Urabe because Urabe created the giant stakes and must answer for losing them.
Source: Urabe Strategy
Akagi throws away a formed 3-pin triplet so that Ichikawa understands the intended message: stop relying on pinzu and make the later direct Ron battle revolve around manzu and souzu.
Source: Ichikawa Strategy / Attack on Ichikawa
By winning on the swapped Xia, Akagi sends Ichikawa the message that blindness prevents him from cleanly policing this class of tile-swap cheat, changing the negotiation balance immediately.
Source: Ichikawa Strategy / Reduction
Akagi's pressure and wording toy with Nangou's emotions enough that Nangou abandons passivity and takes the bolder approach that lets him convert the hand.
Source: Akagi Shigeru Document feat
Category
Strategy archive records.
Akagi understands that Ryuzaki and the others will not dare harm him while officers are physically present in the room and uses that as protection while changing the state of the hand.
Source: Akagi Shigeru Document feat
Akagi eventually discards the 6 man that lets Urabe Ron because the loss drives Urabe deeper into the point-protection and retreat logic Akagi wants to exploit later.
Source: Urabe Strategy
Akagi openly shows danger and hand value through calls so Urabe burns safe tiles earlier than he wants and ends up with fewer clean exits in the final turns.
Source: Urabe Strategy
Akagi completes Dai San Gen and Su Ankou in the detective's presence, and the hostile side cannot retaliate physically without ruining themselves in front of the police.
Source: Akagi Shigeru Document feat
Akagi not only traps the discard but structures the last phase so the finishing line also cashes out as Houtei Ron with the needed value swing.
Source: Urabe Strategy
Once the round swings in his favor, Akagi converts an extremely strong starting structure into a large-scoring line with Honitsu, Chanta, 3 Ankou, Chun, Hatsu, and Dora value.
Source: Ichikawa Strategy
After steering the whole exchange, Akagi pulls the needed tile from the Kan stack and completes the hand at the exact moment the manipulated indicator now benefits him.
Source: Ichikawa Strategy / final round
Akagi's handling of the North tiles is also used to align the turn order and final draw flow so that the endgame discard happens in the exact shape he wants.
Source: Urabe Strategy
Akagi proposes the one-tenth reduction again right after proving the cheat threat, aligning Ichikawa's best-interest path with accepting the deal instead of dragging the game on.
Source: Ichikawa Strategy / Reduction
The Kokushi pressure is not meant to win that hand directly; it is meant to ensure the round ends in a way that does not further damage Akagi's score.
Source: Ichikawa Strategy
Akagi's restructured hand is not only aimed at Dai San Gen but also at maintaining the closed triplet structure needed for Su Ankou at the same time.
Source: Akagi Shigeru Document feat
In the Ryuzaki material, Akagi's evolving hand includes concealed quad structure that can expand hidden-dora and hand value while remaining difficult for others to fully map.
Source: Akagi Shigeru Document feat
After surviving the opening, Akagi converts the kept Dora structure into a hand strong enough to put him into a safer score zone instead of remaining one small hit from death.
Source: Ichikawa Strategy / Revival
Category
FSEQ archive records.
Akagi tells Nangou that his spirit already died, that his back shows he lacks the strength to win, and that he is only trying to survive rather than win, correctly identifying Nangou's fear state.
Source: Akagi Shigeru Document feat
Category
Adaptability archive records.
After making the side players anchor on Honitsu and Chanta, Akagi abruptly disproves those readings and reveals the hand is heading toward multi-Kan development instead.
Source: Ichikawa Strategy / Revival
When the police arrive, Akagi realizes they will not leave immediately and that their presence changes what Ryuzaki's side can and cannot do.
Source: Akagi Shigeru Document feat
Category
Adversity Capacity archive records.
Akagi explicitly contrasts himself with Urabe by saying he is gambling with other people's money, so the high-stakes tactic does not corner his own mind the way it corners Urabe's.
Source: Urabe Strategy
Akagi survives the reckless 'Game of Chicken' incident, gets his car destroyed, and still saves himself by swimming out instead of dying in the crash.
Source: Akagi Shigeru Document feat
Category
FSSQ archive records.
Nangou quickly becomes convinced that Akagi has unusual strength and reading ability and asks for his help in the next hanchan despite Akagi being an unknown kid.
Source: Akagi Shigeru Document feat
Category
Decision Making archive records.
Before his brilliance becomes obvious, Akagi still reportedly avoids making bad discards that directly benefit the opponents.
Source: Akagi Shigeru Document feat
Akagi correctly concludes that both he and Ichikawa now have too many points for the match to end naturally in a reasonable timeframe, so the format itself has to be changed or exploited.
Source: Ichikawa Strategy / Reduction
Akagi deliberately accepts the 8000-point penalty rather than expose his Riichi hand to Urabe, valuing secrecy over points.
Source: Urabe Strategy
Akagi recognizes that no one is likely to feed him voluntarily, so the open Riichi costs little and can instead be weaponized for information and pressure.
Source: Urabe Strategy
While cheating to survive, Akagi specifically chooses the route that preserves Haku because its Dora value matters more for the comeback line than Chun.
Source: Ichikawa Strategy / Revival
Akagi arrives to a 2000-point emergency against a blind expert while the other players are already in Riichi-like danger states and immediately sees that ordinary discarding is not viable.
Source: Ichikawa Strategy
Akagi understands this is the round where he must finish things and that the required close is a Mangan-level Ron directly off Ichikawa rather than a slower exchange.
Source: Ichikawa Strategy / final round
Even when Urabe discards a tile Akagi could use, Akagi declines the immediate gain because keeping Urabe uncertain matters more than the direct score at that point.
Source: Urabe Strategy
As dealer with the right hand quality, Akagi accurately identifies that this is the round where a direct Mangan-level Ron is enough to swing the match.
Source: Urabe Strategy
Category
Thinking archive records.
Akagi not only makes the read, but can later reconstruct the logic for Yasouka step by step, showing that the decision was analytical rather than intuitive luck alone.
Source: Akagi Shigeru Document feat
Akagi makes his hand look strongly Tanyao-like, then relies on Urabe's panic to suspect even non-Tanyao tiles as traps anyway, expanding the set of tiles Urabe is too afraid to throw.
Source: Urabe Strategy
Akagi uses the disruption to turn the hand toward Dai San Gen by aligning the three dragon triplets around Haku, Hatsu, and Chun.
Source: Akagi Shigeru Document feat
Category
FSIQ archive records.
The source emphasizes that Akagi had to absorb tile names, tile faces, rules, and pairing logic in those same few minutes and then use that information live.
Source: Akagi Shigeru Document feat
Category
Knowledge archive records.
Akagi is introduced as a complete beginner, then gets only about five minutes to study the rules before entering a high-stakes underground mahjong match.
Source: Akagi Shigeru Document feat
Category
Perception archive records.
Akagi notices the surrounding Riichi pressure and the Dora status of Haku and correctly treats the word tiles in his own hand as especially dangerous to throw in the opening emergency.
Source: Ichikawa Strategy
Akagi tracks the dice/start position logic and realizes there is finally a round where the custom stack in front of Ichikawa is nearly depleted, greatly narrowing Ichikawa's swap resources.
Source: Ichikawa Strategy / final round
Akagi later explains Ryuzaki's discard pool in terms of safe and dangerous regions, using the pattern of discards rather than raw superstition to judge cut risk.
Source: Akagi Shigeru Document feat
Akagi notices that Urabe's discards stop showing offensive progression and instead become obviously safe, confirming that Urabe has given up on building the win and is only running.
Source: Urabe Strategy
Akagi watches Urabe respond to Osamu's aggression and notices that Urabe stays relatively passive, observes first, and does not rush into maximal punishment.
Source: Urabe Strategy
Akagi throws away a Dora in part to observe Urabe's reaction and confirm that Urabe is overly alert to expensive hand possibilities Akagi may not actually be pursuing.
Source: Urabe Strategy
When others overvalue the overturned tile, Akagi explicitly classifies it as noise and refuses to let it distort the real read of Ryuzaki's hand.
Source: Akagi Shigeru Document feat
Category
Reasoning archive records.
By tracing when Iiwan and then Suwan are cut, Akagi concludes those tiles mean more than the sou discard and help indicate the true danger line in Ryuzaki's manzu shape.
Source: Akagi Shigeru Document feat
Akagi concludes that Urabe is likely waiting on 1, 4, or 7 man from the way the exposed manzu structure and remaining concealed possibilities fit together.
Source: Urabe Strategy
Akagi reasons that the early 6 sou discard means there were no useful surrounding souzu shapes worth preserving around it, narrowing what Ryuzaki can actually be waiting on.
Source: Akagi Shigeru Document feat
From the head-part retreat read, Akagi concludes Urabe is likely still holding another 2 pin and starts building the final trap around that assumption.
Source: Urabe Strategy
Akagi notices the Chun distribution and uses the lack of discarded copies to reason that Ichikawa likely still has Chun in hand.
Source: Ichikawa Strategy / final round
Category
Psychology archive records.
Akagi explicitly identifies Nangou's mindset as the final thought pattern of gamblers who have been on a losing streak, showing not just perception but categorization of the mental state.
Source: Akagi Shigeru Document feat
Akagi's early performance makes the bespectacled player nervous enough to suggest calling the rep player Yagi Keiji just to handle him.
Source: Akagi Shigeru Document feat
By hiding the hand after constantly breaking expectations, Akagi deepens Urabe's sense that Akagi may already be seeing through him and doing things beyond normal play logic.
Source: Urabe Strategy
By showing that he intentionally kept the 4 man, Akagi makes it obvious to Urabe that he understood the dangerous wait and consciously dodged it.
Source: Urabe Strategy
Akagi's Kan sequence keeps creating new Dora and new uncertainty, increasing the panic of opponents whose earlier theories about his hand have already failed.
Source: Ichikawa Strategy / Revival
Akagi watches Urabe's ongoing match and notes that Urabe is holding back, discarding Dora, and using stake pressure rather than simple aggression, building a psychological model before direct contact.
Source: Urabe Strategy / Akagi : Urabe Arc
Akagi reads that Urabe is not only dodging Dora implications but also staying away from other lines like three-color development once Akagi keeps violating expectations.
Source: Urabe Strategy
Akagi's earlier play leaves the room in a state where Ryuzaki's yakuza pride makes calling Yagi feel humiliating, which Akagi benefits from.
Source: Akagi Shigeru Document feat
Akagi recognizes that Urabe's tactic is to keep raising the stakes so weaker opponents drift into cowardly decisions under monetary pressure.
Source: Urabe Strategy
From the Osamu observation, Akagi concludes that Urabe's deeper habit under major danger is not full offense or surrender but cautious passivity and stalling.
Source: Urabe Strategy
Akagi concludes from the result that Urabe did not go fully defensive or fully offensive, but chose a mediocre safe middle stance while slowly building his hand.
Source: Urabe Strategy
At the start of the last phase, Akagi notices Urabe's aggression is not true fighting spirit but merely the logical pose of someone who thinks he still has the point advantage.
Source: Urabe Strategy
Category
STP archive records.
Akagi notices that Ryuzaki looks toward the manzu side when he declares Riichi and treats that glance as a tell that the dangerous wait is in manzu, not pinzu.
Source: Akagi Shigeru Document feat
When Urabe discards a 2 pin from inside his hand, Akagi interprets it as the classic sign that Urabe is giving up ground and throwing one half of a pair head because that leaves another future safe tile if it passes.
Source: Urabe Strategy
Category
Outsmarting archive records.
Against Nangou and Yasouka's objections, Akagi throws the tile that looks suicidal on the surface because his pool read tells him another tile was the true danger and this one was the safer line.
Source: Akagi Shigeru Document feat
Once the first route is blocked, Ichikawa falls back to changing the Dora indicator to Chun, exactly the secondary path Akagi wanted to force.
Source: Ichikawa Strategy / final round
After making almost every other realistic discard lane look compromised, Akagi leaves Urabe with the 2 pin as the only discard that still feels defensible and takes the finishing Ron from it.
Source: Urabe Strategy / Process of elimination Strategy
Akagi closes out the entire Ichikawa fight with the completed hand, Rinshan Kaihou, 3 Shoku Doujun, and the Haku Dora structure that only exists because he manipulated Ichikawa into choosing the wrong indicator response.
Source: Ichikawa Strategy / final round
Akagi gets Urabe to throw the 2 man, ruining the stronger Urabe posture and shifting the balance of the round even though Akagi still refuses the smaller immediate cash-out.
Source: Urabe Strategy
Akagi intentionally waits on a single word tile because the weaker side players do not want to become central to the Akagi-Ichikawa fight and will likely toss an honor tile they believe is harmless.
Source: Ichikawa Strategy / Revival
Because the 2 pin discard makes Akagi look like he no longer has hidden pinzu, Ichikawa feels safer discarding 1 pin and walks into Akagi's direct Ron.
Source: Ichikawa Strategy / Attack on Ichikawa
Category
Foresight archive records.
Akagi correctly expects that cautious Ichikawa will worry even about the slim chance of a Pei Kan creating a Rinshan Kaihou plus extra Dora problem and therefore will try to interfere.
Source: Ichikawa Strategy / final round
Akagi abandons the live-tile wait and moves into a 3 pin trap because he predicts the left player will avoid manzu and be more willing to throw pinzu or souzu under current pressure.
Source: Ichikawa Strategy / Revival
Because Ichikawa is rational, defensive, and blind, Akagi infers there is a real chance Ichikawa kept Xia precisely because it reads as safe in future danger states.
Source: Ichikawa Strategy / Reduction
Because Ichikawa expects the next rounds to favor him if he simply avoids disaster, Akagi correctly predicts that Ichikawa's first priority will be refusing any path that gives Akagi the direct finishing Ron.
Source: Ichikawa Strategy / final round
Akagi foresees that Ichikawa's first instinct will be to alter the tile Akagi pulls from the Kan stack before considering the indicator route.
Source: Ichikawa Strategy / final round
Akagi expects that Osamu, once slightly sheltered from pressure and stuck in a losing state, will chase larger hands and take bigger risks to recover.
Source: Urabe Strategy
Akagi reads enough from Urabe's structure to conclude that Urabe is bound to hold the 2 man tile that will be used in the disarm step.
Source: Urabe Strategy
Category
Tactics archive records.
Once he solves the 1-4-7 man danger, Akagi preserves the 4 man and discards 5 sou even though a more naive line would do the opposite.
Source: Urabe Strategy
Akagi intercepts the arm movement so Ichikawa cannot comfortably reach the desired swap line, cutting off the first branch of the counterplay.
Source: Ichikawa Strategy / final round
Akagi takes the Pei exactly when needed, fully expecting the call itself to activate Ichikawa's interference plan.
Source: Ichikawa Strategy / final round
Once Urabe accepts the false logic and discards North, Akagi cashes the direct Ron exactly as planned.
Source: Urabe Strategy
The left player follows the pressured logic Akagi predicted and discards into the 3 pin line, giving Akagi the direct Ron.
Source: Ichikawa Strategy / Revival
The trap succeeds, Ichikawa discards Xia thinking it must be safe, and Akagi takes the Ron from the tile that should have been impossible if no cheating occurred.
Source: Ichikawa Strategy / Reduction