Koki Ishihara

Current Standing

Week ending Oct 4, 2026

Career Record

Career high

#4194

Weeks ranked

8

Career high, weeks at number one and weeks ranked are counted from the weekly ranking itself. Ranking events and wins are as published by OWGR, and cover events that predate our tournament records.

Tournament Results

68 ranking events since 2018. MC is a missed cut and WD a withdrawal, shown where the scorecard evidences it; a dash means no finishing position was recorded.

1. May 24, 2026Japan PGA Championship Senko Group Cup—
2. Jul 6, 2025Minami Akita CC Michinoku Challenge Tournament—
3. Jun 1, 2025Taiheiyo Club Challenge Tournament35
4. May 26, 2024Gate Way To The Open Mizuno Open—
5. Oct 1, 2023elite grips challenge26
6. Sep 3, 2023DUNLOP PHOENIX tournament challenge in Fukushima15
7. Jun 11, 2023Landic Challenge 10—
8. May 28, 2023Taiheiyo Club Challenge Tournament—
9. Oct 23, 2022Japan Open Golf Championship36
10. Oct 16, 2022Delight Works JGTO FINAL67
11. Oct 9, 2022For The Players By The Players25
12. Oct 2, 2022Elite grips challenge—
13. Sep 25, 2022ISPS HANDA Hero ni nare! Challenge Tournament—
14. Sep 18, 2022PGM Challenge19
15. Sep 4, 2022DUNLOP PHOENIX tournament challenge in Fukushima18
16. Jul 31, 2022Minami Akita Country Club Michinoku Challenge Tournament—
17. Jul 24, 2022JAPAN PLAYERS CHAMPIONSHIP CHALLENGE in FUKUI 202245
18. Jun 26, 2022JAPAN PLAYERS CHAMPIONSHIP by Sato Shokuhin—
19. Jun 19, 2022Japan Create Challenge in FukuokaRaizan—
20. Jun 12, 2022LANDIC CHALLENGE 9—
21. May 29, 2022Taiheiyo Club Challenge Tournament—
22. Apr 24, 2022ISPS HANDA Championship in JAPAN48
23. Apr 10, 2022Novil Cup—
24. Oct 10, 2021Ryo Ishikawa everyone PROJECT Challenge—
25. Oct 3, 2021TI Challenge in Tojonomori11
26. Sep 26, 2021ISPS HANDA Hero ni nare! Challenge Tournament41
27. Sep 19, 2021PGM Challenge11
28. Aug 1, 2021Minami Akita CC Michinoku Challenge—
29. Jul 11, 2021JAPAN PLAYERS CHAMPIONSHIP CHALLENGE—
30. Jun 27, 2021Daisendori Cup—
31. May 30, 2021Taiheiyo Club Challenge Tournament—
32. Apr 18, 2021i Golf Shaper Challenge in Chikushigaoka22
33. Oct 25, 2020Delight Works Challenge—
34. Oct 4, 2020TI Challenge50
35. Sep 20, 2020PGM Challenge II—
36. Oct 13, 2019Macau Championship47
37. Aug 25, 2019PGM Northport ADT Championship8
38. Jul 28, 2019Dongguan Open34
39. Jul 21, 2019Guangzhou Open—
40. Jul 7, 2019Tianjin Binhai Forest Open—
41. Jun 30, 2019Beijing Open—
42. Jun 23, 2019Huangshan Championship9
43. Jun 16, 2019KEB Hana Bank Invitational—
44. May 26, 2019Nantong Championship—
45. May 19, 2019Qinhuangdao Championship—
46. May 12, 2019Beijing Championship—
47. Apr 28, 2019Shenzhou Peninsula Open72
48. Apr 21, 2019Bo Ao Open—
49. Mar 17, 2019PGM UMW ADT Championship—
50. Dec 2, 2018PGM Maybank Championship—
51. Nov 11, 2018Combiphar Players Championship—
52. Oct 14, 2018Clearwater Bay Open—
53. Oct 7, 2018Zhuhai Championship—
54. Sep 30, 2018Macau Championship26
55. Sep 2, 2018Suzhou Championship43
56. Aug 19, 2018Taifong Open—
57. Aug 12, 2018PGM Sabah Championship27
58. Jul 22, 2018Qingdao Championship—
59. Jul 15, 2018Yantai Championship—
60. Jun 17, 2018Kunming Championship—
61. Jun 10, 2018Guilin Championship—
62. May 13, 2018Haikou Championship37
63. May 6, 2018Changsha Championship—
64. Apr 8, 2018PGM Johor Championship—
65. Mar 25, 2018Chongqing Championship—
66. Mar 18, 2018Chengdu Championship—
67. Mar 11, 2018Richard Mille Brunei Championships—
68. Jan 28, 2018PGM Darulaman Championship41