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Fight Matrix
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Keito Oyama

  Keito Oyama's profile at Sherdog 

Keito Oyama's profile at Tapology 

Birth Date: 1998-03-16
Last 5: L W W W W
Association: Freelance
Pro Debut Date: 2020-12-19
Pro Record: 9-7-0
Current Ranking:
#20 Women Atomweight
'Big League' Record: 9-7-0
Last 3 Years: 6-3-0
Win Finish %: 44.4%
Combat Age: 32
Quality Perf. %: 43.8%
Last Quality Perf.: 2025-11-02
540 Metric: .500
Rating Points: 22
Highest Quarterly Ranking: 10/01/2025

#15 Women Atomweight
Last Fight Date: 11/02/2025 [Rizin Fighting Federation]
Last Opponent: [NR] Bo Mi Lee
Next Fight: Rizin FF - Rizin 52
Next Opponent: [#5 W105] Saori Oshima
Last Loss Date: 7/28/2024
Last Loss: [#19 W105] Rena Kubota
Opponent's Last 5: W L W W L

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

  Opponent Outcome
W Bo Mi Lee Decision (Unanimous)
Round 3
  RIZIN LANDMARK 12 in KOBE
Sunday, November 2nd 2025
W Emi Tomimatsu TKO (Punches)
Round 2
  Deep - Jewels 50
Sunday, September 7th 2025
W Yu Ri Shim
#31 Women Atomweight 		Decision (Unanimous)
Round 3
  Rizin FF - World Series in Korea
Saturday, May 31st 2025
W Junna Tsukii Submission (Rear-Naked Choke)
Round 2
  Deep - 122 Impact
Monday, November 4th 2024
L Rena Kubota
#11 Women Atomweight 		TKO (Punches)
Round 2
  Rizin FF - Super Rizin 3
Sunday, July 28th 2024
W Yuko Kiryu
#115 Women Strawweight 		TKO (Punches)
Round 1
  Deep - Jewels 44
Sunday, March 24th 2024
L Moeri Suda
#21 Women Atomweight 		Decision (Unanimous)
Round 2
  Deep - Jewels 42: 10th Anniversary
Sunday, September 10th 2023
W Saki Kitamura Decision (Unanimous)
Round 2
  Deep - Jewels 41
Sunday, May 28th 2023
L Hikaru Aono
#32 Women Atomweight 		Decision (Unanimous)
Round 2
  Deep - Jewels 40
Saturday, February 18th 2023
W Eru Takebayashi Decision (Split)
Round 2
  Deep - Jewels 38
Sunday, September 11th 2022
L Mika Arai Decision (Unanimous)
Round 2
  Deep - 108 Impact
Sunday, July 10th 2022
L Mika Nagano Submission (Guillotine Choke)
Round 2
  Deep - Jewels 37
Sunday, May 8th 2022
W Aoi Kuriyama Decision (Unanimous)
Round 2
  Deep - Jewels 35
Saturday, December 11th 2021
L Mikiko Shimizu Decision (Unanimous)
Round 2
  Deep - Jewels 34
Saturday, September 4th 2021
L Namiko Kawabata Decision (Unanimous)
Round 2
  Deep - Jewels 32
Sunday, March 7th 2021
W Marina Kumagai Technical Submission (Armbar)
Round 1
  Deep - Jewels 31
Saturday, December 19th 2020
  Opponent Event Outcome
W Bo Mi Lee   RIZIN LANDMARK 12 in KOBE
Sunday, November 2nd 2025 		Decision (Unanimous)
Round 3
W Emi Tomimatsu   Deep - Jewels 50
Sunday, September 7th 2025 		TKO (Punches)
Round 2
W Yu Ri Shim
#31 Women Atomweight 		  Rizin FF - World Series in Korea
Saturday, May 31st 2025 		Decision (Unanimous)
Round 3
W Junna Tsukii   Deep - 122 Impact
Monday, November 4th 2024 		Submission (Rear-Naked Choke)
Round 2
L Rena Kubota
#11 Women Atomweight 		  Rizin FF - Super Rizin 3
Sunday, July 28th 2024 		TKO (Punches)
Round 2
W Yuko Kiryu
#115 Women Strawweight 		  Deep - Jewels 44
Sunday, March 24th 2024 		TKO (Punches)
Round 1
L Moeri Suda
#21 Women Atomweight 		  Deep - Jewels 42: 10th Anniversary
Sunday, September 10th 2023 		Decision (Unanimous)
Round 2
W Saki Kitamura   Deep - Jewels 41
Sunday, May 28th 2023 		Decision (Unanimous)
Round 2
L Hikaru Aono
#32 Women Atomweight 		  Deep - Jewels 40
Saturday, February 18th 2023 		Decision (Unanimous)
Round 2
W Eru Takebayashi   Deep - Jewels 38
Sunday, September 11th 2022 		Decision (Split)
Round 2
L Mika Arai   Deep - 108 Impact
Sunday, July 10th 2022 		Decision (Unanimous)
Round 2
L Mika Nagano   Deep - Jewels 37
Sunday, May 8th 2022 		Submission (Guillotine Choke)
Round 2
W Aoi Kuriyama   Deep - Jewels 35
Saturday, December 11th 2021 		Decision (Unanimous)
Round 2
L Mikiko Shimizu   Deep - Jewels 34
Saturday, September 4th 2021 		Decision (Unanimous)
Round 2
L Namiko Kawabata   Deep - Jewels 32
Sunday, March 7th 2021 		Decision (Unanimous)
Round 2
W Marina Kumagai   Deep - Jewels 31
Saturday, December 19th 2020 		Technical Submission (Armbar)
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 2 #17 Women Atomweight 9-7-0
23
10/01/2025 4 #15 Women Atomweight 8-7-0
26
07/01/2025 3 #19 Women Atomweight 7-7-0
23
04/01/2025   #22 Women Atomweight 6-7-0
21
01/01/2025 4 #22 Women Atomweight 6-7-0
21
10/01/2024 3 #26 Women Atomweight 5-7-0
18
07/01/2024 4 #23 Women Atomweight 5-6-0
20
04/01/2024 NR #19 Women Atomweight 5-6-0
22


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.

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