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Genpei Hayashi

  Genpei Hayashi's profile at Sherdog 

Genpei Hayashi's profile at Tapology 

Birth Date: 1989-11-09
Last 5: W W W L L
Association: Iggy Hand's Gym
Pro Debut Date: 2013-01-12
Pro Record: 12-13-1
Current Ranking:
#451 Middleweight
'Big League' Record: 12-13-1
Last 3 Years: 1-2-0
Win Finish %: 41.7%
Combat Age: 47
Quality Perf. %: 50%
Last Quality Perf.: 2023-06-04
540 Metric: .692
Rating Points: 20
Highest Quarterly Ranking: 4/01/2020

#274 Lightweight
Last Fight Date: 7/27/2025 [Pancrase]
Last Opponent: [#373 MW] Ryutaro Sato
Opponent's Last 5: W W W W L

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

  Opponent Outcome
L Ryutaro Sato
#298 Middleweight 		Decision (Unanimous)
Round 3
  Pancrase - 355
Sunday, July 27th 2025
L Ryuichiro Sumimura
#293 Welterweight 		TKO (Punches)
Round 5
  Pancrase - 340: 30th Anniversary Tournament 2
Sunday, December 24th 2023
W Akihiro Murayama
#379 Welterweight 		Decision (Unanimous)
Round 5
  Pancrase - 334
Sunday, June 4th 2023
W Kota Shirakawa
#532 Welterweight 		TKO (Punches)
Round 1
  Pancrase - 330
Sunday, December 25th 2022
W Yuta Nakamura
#889 Welterweight 		Decision (Unanimous)
Round 3
  Pancrase - 329
Sunday, September 11th 2022
L Kousuke Kindaichi
#401 Lightweight 		Decision (Unanimous)
Round 3
  Pancrase - 325
Sunday, December 12th 2021
L Kazuki Kasai
#283 Welterweight 		Decision (Unanimous)
Round 3
  Pancrase - 323
Sunday, September 12th 2021
L Tatsuya Saika
#325 Lightweight 		KO (Punch)
Round 1
  Pancrase - 318
Sunday, September 27th 2020
W Kenichiro Togashi
#279 Lightweight 		Decision (Split)
Round 3
  Pancrase - 308
Sunday, September 29th 2019
W Ukyo Abe
#635 Lightweight 		TKO (Elbows and Punches)
Round 1
  Pancrase - 306
Sunday, June 30th 2019
L Yuki Niimura
#192 Middleweight 		Decision (Technical Majority)
Round 3
  Pancrase 298 - Araujo vs. Fujino
Sunday, August 5th 2018
L Ken Hasegawa
#153 Welterweight 		Submission (Arm Triangle Choke)
Round 1
  DEEP 82 Impact
Saturday, February 24th 2018
L Tatsuya Mizuno
#164 Middleweight 		Decision (Unanimous)
Round 3
  Deep - 79 Impact
Saturday, September 16th 2017
L Yuki Yamasaki
#612 Lightweight 		Decision (Unanimous)
Round 3
  Pancrase - Osaka
Sunday, July 16th 2017
W Juntaro Ami
#648 Lightweight 		Decision (Unanimous)
Round 3
  Pancrase - 280
Sunday, September 11th 2016
W Shigeaki Kusayanagi
#615 Welterweight 		Decision (Unanimous)
Round 3
  Pancrase - 278
Sunday, June 12th 2016
W Atsushi Ueda
#772 Lightweight 		Decision (Unanimous)
Round 3
  Pancrase - 275
Sunday, January 31st 2016
L Shunpei Ota
#901 Lightweight 		Decision (Unanimous)
Round 3
  Pancrase - 270
Sunday, October 4th 2015
W Yutaka Kobayashi KO (Punch)
Round 2
  Pancrase - 264
Sunday, February 1st 2015
L Takashi Sato
#615 Welterweight 		TKO (Punches)
Round 1
  Pancrase - 260
Sunday, August 10th 2014
D Hiroshi Takahashi
#1036 Welterweight 		Draw
Round 2
  Deep - Fujisan Matsuri
Sunday, May 25th 2014
W Shotaro Yabe Decision (Unanimous)
Round 3
  Pancrase - Bayside Fight 3
Sunday, April 20th 2014
W Junya Nishikawa KO (Soccer Kick)
Round 1
  Pancrase - 256
Sunday, February 2nd 2014
L Takashi Matsuoka
#795 Lightweight 		Decision (Unanimous)
Round 2
  Pancrase - 255
Sunday, December 8th 2013
L Ben Buchan Submission (Rear Naked Choke)
Round 1
  Pancrase 247
Sunday, May 19th 2013
W Akihito Hara TKO (Punches)
Round 2
  Pancrase 244
Saturday, January 12th 2013
  Opponent Event Outcome
L Ryutaro Sato
#298 Middleweight 		  Pancrase - 355
Sunday, July 27th 2025 		Decision (Unanimous)
Round 3
L Ryuichiro Sumimura
#293 Welterweight 		  Pancrase - 340: 30th Anniversary Tournament 2
Sunday, December 24th 2023 		TKO (Punches)
Round 5
W Akihiro Murayama
#379 Welterweight 		  Pancrase - 334
Sunday, June 4th 2023 		Decision (Unanimous)
Round 5
W Kota Shirakawa
#532 Welterweight 		  Pancrase - 330
Sunday, December 25th 2022 		TKO (Punches)
Round 1
W Yuta Nakamura
#889 Welterweight 		  Pancrase - 329
Sunday, September 11th 2022 		Decision (Unanimous)
Round 3
L Kousuke Kindaichi
#401 Lightweight 		  Pancrase - 325
Sunday, December 12th 2021 		Decision (Unanimous)
Round 3
L Kazuki Kasai
#283 Welterweight 		  Pancrase - 323
Sunday, September 12th 2021 		Decision (Unanimous)
Round 3
L Tatsuya Saika
#325 Lightweight 		  Pancrase - 318
Sunday, September 27th 2020 		KO (Punch)
Round 1
W Kenichiro Togashi
#279 Lightweight 		  Pancrase - 308
Sunday, September 29th 2019 		Decision (Split)
Round 3
W Ukyo Abe
#635 Lightweight 		  Pancrase - 306
Sunday, June 30th 2019 		TKO (Elbows and Punches)
Round 1
L Yuki Niimura
#192 Middleweight 		  Pancrase 298 - Araujo vs. Fujino
Sunday, August 5th 2018 		Decision (Technical Majority)
Round 3
L Ken Hasegawa
#153 Welterweight 		  DEEP 82 Impact
Saturday, February 24th 2018 		Submission (Arm Triangle Choke)
Round 1
L Tatsuya Mizuno
#164 Middleweight 		  Deep - 79 Impact
Saturday, September 16th 2017 		Decision (Unanimous)
Round 3
L Yuki Yamasaki
#612 Lightweight 		  Pancrase - Osaka
Sunday, July 16th 2017 		Decision (Unanimous)
Round 3
W Juntaro Ami
#648 Lightweight 		  Pancrase - 280
Sunday, September 11th 2016 		Decision (Unanimous)
Round 3
W Shigeaki Kusayanagi
#615 Welterweight 		  Pancrase - 278
Sunday, June 12th 2016 		Decision (Unanimous)
Round 3
W Atsushi Ueda
#772 Lightweight 		  Pancrase - 275
Sunday, January 31st 2016 		Decision (Unanimous)
Round 3
L Shunpei Ota
#901 Lightweight 		  Pancrase - 270
Sunday, October 4th 2015 		Decision (Unanimous)
Round 3
W Yutaka Kobayashi   Pancrase - 264
Sunday, February 1st 2015 		KO (Punch)
Round 2
L Takashi Sato
#615 Welterweight 		  Pancrase - 260
Sunday, August 10th 2014 		TKO (Punches)
Round 1
D Hiroshi Takahashi
#1036 Welterweight 		  Deep - Fujisan Matsuri
Sunday, May 25th 2014 		Draw
Round 2
W Shotaro Yabe   Pancrase - Bayside Fight 3
Sunday, April 20th 2014 		Decision (Unanimous)
Round 3
W Junya Nishikawa   Pancrase - 256
Sunday, February 2nd 2014 		KO (Soccer Kick)
Round 1
L Takashi Matsuoka
#795 Lightweight 		  Pancrase - 255
Sunday, December 8th 2013 		Decision (Unanimous)
Round 2
L Ben Buchan   Pancrase 247
Sunday, May 19th 2013 		Submission (Rear Naked Choke)
Round 1
W Akihito Hara   Pancrase 244
Saturday, January 12th 2013 		TKO (Punches)
Round 2

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
10/01/2025 NR #463 Middleweight 12-13-1
21
01/01/2025 38 #587 Welterweight 12-12-1
25
10/01/2024 25 #549 Welterweight 12-12-1
25
07/01/2024 68 #524 Welterweight 12-12-1
26
04/01/2024 2 #456 Welterweight 12-12-1
28
01/01/2024 161 #458 Welterweight 12-12-1
28
10/01/2023 2 #297 Welterweight 12-11-1
39
07/01/2023 71 #295 Welterweight 12-11-1
39
04/01/2023 2 #366 Welterweight 11-11-1
32
01/01/2023 184 #364 Welterweight 11-11-1
32
10/01/2022 NR #548 Welterweight 10-11-1
23
07/01/2022 11 #716 Lightweight 9-11-1
21
04/01/2022 1 #705 Lightweight 9-11-1
21
01/01/2022 102 #704 Lightweight 9-11-1
21
10/01/2021 NR #602 Lightweight 9-10-1
23
07/01/2021 105 #503 Welterweight 9-9-1
21
04/01/2021 31 #398 Welterweight 9-9-1
24
01/01/2021 9 #429 Welterweight 9-9-1
25
10/01/2020 NR #438 Welterweight 9-9-1
28
07/01/2020 35 #309 Lightweight 9-8-1
41
04/01/2020 2 #274 Lightweight 9-8-1
46
01/01/2020 12 #276 Lightweight 9-8-1
46
10/01/2019 235 #288 Lightweight 9-8-1
44
07/01/2019 NR #523 Lightweight 8-8-1
29
04/01/2019 25 #509 Middleweight 7-8-1
17
01/01/2019 38 #534 Middleweight 7-8-1
17
10/01/2018 32 #496 Middleweight 7-8-1
18
07/01/2018 15 #528 Middleweight 7-7-1
18
04/01/2018 14 #543 Middleweight 7-7-1
18
01/01/2018 70 #529 Middleweight 7-6-1
18
10/01/2017 NR #459 Middleweight 7-6-1
20
07/01/2017 37 #454 Lightweight 7-4-1
32
04/01/2017 15 #491 Lightweight 7-4-1
30
01/01/2017 124 #506 Lightweight 7-4-1
30
10/01/2016 156 #382 Lightweight 7-4-1
36
07/01/2016 118 #538 Lightweight 6-4-1
29
04/01/2016 505 #656 Lightweight 5-4-1
23
01/01/2016 228 #1161 Lightweight 4-4-1
17
10/01/2015 8 #933 Lightweight 4-3-1
18
07/01/2015 7 #925 Lightweight 4-3-1
18
04/01/2015 NR #918 Lightweight 4-3-1
18
07/01/2014 NR #988 Welterweight 3-2-1
16


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

  • Pound for Pound
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  • Heavyweight+
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  • Bantamweight
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  • Women’s Featherweight+
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  • Women’s Strawweight
  • Women’s Atomweight
  • Unknown Division

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