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Data Oyakata
Grand Sumo Predictions
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Analysis12

Is promotion to sanyaku a real wall?

27.7% Kachi-koshi rate for newly promoted sanyaku

Conclusion

The wall is real. Rikishi making their first appearance at Komusubi or Sekiwake averaged 6.16 wins, and only 27.7% made kachi-koshi. Facing Yokozuna and Ozeki day after day is a measurable step up in difficulty.

How to read this number

A 27.7% kachi-koshi rate for first-time sanyaku is far below the 42.3% for Komusubi overall. At the same rank, only those arriving for the first time struggle this badly.

The main cause is scheduling. Sanyaku are matched against Yokozuna and Ozeki, a different class of opponent from the upper rank-and-file. However well a rikishi did below, fifteen days against the elite is a workload he has never carried.

Read the other way, any newly promoted rikishi who does post a winning record has cleared that 27.7% barrier. It deserves to be treated as a bigger achievement than the headline suggests.

Methodology

Period
Hatsu 2000 through Natsu 2026
Sample
Basho went to Komusubi or Sekiwake for the first time and took 15 bouts.
Sample size
83Basho
Calculation
8 wins or more23Basho with a winning record rate of 27.7%. Average 6.16 wins
comparison
Komusubi overall is 42.3% (310Basho), average 6.96 wins

How to read this

The momentum before promotion and the strength of the opponent are not individually arranged.