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Fight Matrix
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Seiya Ameyama

  Seiya Ameyama's profile at Sherdog 

Seiya Ameyama's profile at Tapology 

Birth Date: 2002-10-23
Last 5: W W L W NC
Association: Encounter MMA Training & Fitness Gym
Pro Debut Date: 2023-07-30
Pro Record: 5-3-0
Current Ranking:
#305 Flyweight
'Big League' Record: 5-3-0
Last 3 Years: 5-3-0
Win Finish %: 100%
Combat Age: 23
Quality Perf. %: 37.5%
Last Quality Perf.: 2025-06-29
540 Metric: .519
Rating Points: 28
Highest Quarterly Ranking: 7/01/2025

#266 Flyweight
Last Fight Date: 12/06/2025 [DEEP]
Last Opponent: [NR] Haruto Sunada
Last Loss Date: 3/30/2025
Last Loss: [#299 FLW] Hiroki Takaoka
Opponent's Last 5: W W W L W

Complete Professional MMA Fight History
Fighter rankings represent most recent generated quarterly rating prior to the fight

  Opponent Outcome
NC Haruto Sunada NC
Round 0
  DEEP Osaka Impact 2025 5th Round
Saturday, December 6th 2025
W Tomohiro Adaniya
#517 Bantamweight 		TKO (Doctor Stoppage)
Round 1
  DEEP Osaka Impact 2025 2nd Round
Sunday, June 29th 2025
L Hiroki Takaoka
#386 Flyweight 		Submission (Rear-Naked Choke)
Round 2
  Rizin FF - Rizin 50
Sunday, March 30th 2025
W Takashi Matsuba
#492 Flyweight 		KO (Punches)
Round 1
  Deep - Osaka Impact 2024 4th Round
Sunday, December 22nd 2024
W Kengo Fujita
#434 Flyweight 		TKO (Punches)
Round 1
  Deep - Osaka Impact 2024 3rd Round
Sunday, September 22nd 2024
W Taiki Maeda TKO (Punches)
Round 1
  Deep - Osaka Impact 2024 2nd Round
Sunday, June 2nd 2024
W Terunari Inoue TKO (Punches)
Round 1
  Deep - Osaka Impact 2024 1st Round
Sunday, March 17th 2024
L Kanta Maruyama Submission (Rear-Naked Choke)
Round 1
  Deep - Osaka Impact 2023 3rd Round
Sunday, November 26th 2023
L Daiki Yahiro TKO (Punches)
Round 1
  Deep - Osaka Impact 2023 2nd Round
Sunday, July 30th 2023
  Opponent Event Outcome
NC Haruto Sunada   DEEP Osaka Impact 2025 5th Round
Saturday, December 6th 2025 		NC
Round 0
W Tomohiro Adaniya
#517 Bantamweight 		  DEEP Osaka Impact 2025 2nd Round
Sunday, June 29th 2025 		TKO (Doctor Stoppage)
Round 1
L Hiroki Takaoka
#386 Flyweight 		  Rizin FF - Rizin 50
Sunday, March 30th 2025 		Submission (Rear-Naked Choke)
Round 2
W Takashi Matsuba
#492 Flyweight 		  Deep - Osaka Impact 2024 4th Round
Sunday, December 22nd 2024 		KO (Punches)
Round 1
W Kengo Fujita
#434 Flyweight 		  Deep - Osaka Impact 2024 3rd Round
Sunday, September 22nd 2024 		TKO (Punches)
Round 1
W Taiki Maeda   Deep - Osaka Impact 2024 2nd Round
Sunday, June 2nd 2024 		TKO (Punches)
Round 1
W Terunari Inoue   Deep - Osaka Impact 2024 1st Round
Sunday, March 17th 2024 		TKO (Punches)
Round 1
L Kanta Maruyama   Deep - Osaka Impact 2023 3rd Round
Sunday, November 26th 2023 		Submission (Rear-Naked Choke)
Round 1
L Daiki Yahiro   Deep - Osaka Impact 2023 2nd Round
Sunday, July 30th 2023 		TKO (Punches)
Round 1

Quarterly Generated Historical Rankings
Rating bar represents the fighter's standing relative to the top of the division at the time

Date ↑ ↓ Rank Record Points
01/01/2026 1 #281 Flyweight 5-3-0
30
10/01/2025 14 #280 Flyweight 5-3-0
30
07/01/2025 310 #266 Flyweight 5-3-0
30
04/01/2025 214 #576 Flyweight 4-3-0
19
01/01/2025 311 #362 Flyweight 4-2-0
25
10/01/2024 NR #673 Flyweight 3-2-0
18


A fighter's rank (US) state is assigned based on the state that the fighter most frequently fought in professionally, within the past three years. If there is a tie, the most recent state is used. The Win-Loss-Draw record for the fighter in the "Big Leagues". The Big Leagues refer to the top organizations based on a statistical analysis we performed. Some organizations were counted as one, due to mergers, etc. A quality performance is a fight in which the fighter fought an acceptable opponent, and substantiated their current rating (at the time) based on the outcome. At it's most basic level, one can equate "combat age" to "dog years" in that it will mirror the basic human lifecycle. With this computation, we expect fighters to hit their respective "peak" in the years that your typical adult "peaks" in life, somewhere between 25 and 40. We will expect most fighters to start their descent at some point in their 40s and be far removed from their peak by 60. This is an experimental metric that attempts to reflect a fighter's recent opposition quality. The metric goes back 1,080 days, and looks at all the fighter's opponents' W-L-D records within a window of 540 days before, and 540 days after their respective bout(s) with the fighter. All of the records are added up and the cumulative win percentage is presented by this metric in a "strength of schedule" format. These ranking sets have been generated by a recent version of the software, using recent data and will not match previously published issues of the rankings, especially since a majority of these generated sets are for dates much earlier than the site’s inception.

Current MMA Rankings

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