1835:
215:(April 2020 – September 2020) with a record of 13 wins and 5 losses. Although Koga's third place finish was not sufficient to earn him direct promotion to 4-dan, it was good enough to earn him a second
295:. He finished with a score of 73 points out of a possible 100 to win the competition for the first time. The tournament had been last held in 2019, but was cancelled from 2020 to 2023 due to the
615:[Tsume Shogi Solving Competition: Defending champion Sōta Fujii Meijin, who won the competition the last five times it has been held, decides not to participate].
1916:
1588:
250:
tournament. Koga's victory meant that he satisfied the criteria for promotion to Class C2 for the 80th Meijin League (April 2022 – March 2023).
535:[Yūsei Koga promoted to Meijin Class C2 from the Free Class after advancing to finals; he is the 10th professional to be promoted from Free Class.].
677:
1618:
1578:
1608:
1603:
1568:
1563:
1558:
1548:
240:
1553:
450:[Tomita and Koga promoted to professional status; Nishiyama misses chance to become first female to become regular professional.].
609:
1911:
223:. After consulting with his mentor Nakata, Koga decided he wanted to turn professional even if it meant starting in the Free Class.
1906:
670:
216:
208:
1872:
944:
245:
204:
663:
510:[65th apprentice school 3-dan league: April 2019 to September 2019] (in Japanese). Japan Shogi Association. 2019
485:[67th apprentice school 3-dan league: April 2020 to September 2020] (in Japanese). Japan Shogi Association. 2020
303:
8-crown title holder, who won the competition the last five times it was held, did not participate in the competition.
320:
212:
196:
564:[Yūsei Koga promoted to Class C2 from Free Class] (in Japanese). Japan Shogi Association. September 8, 2021
188:, Japan on February 13, 1996. He learned how to play shogi from his grandfather when he was about four years old.
1901:
589:[Professional Shogi Player Database: Yūsei Koga Promotion History] (in Japanese). Japan Shogi Association
259:
385:[Apprentice professional 3-dan League: Takumi Itō finishes first, but Seiya Tomita also promoted.].
1371:
529:
379:
319:
Koga earned his first promotion point in third place with a record of 13 wins and 5 losses in the 65th
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1205:
169:
1291:
1865:
1522:
758:
1009:
979:
351:
192:
1442:
1891:
1787:
929:
848:
813:
763:
504:
479:
1055:
1004:
530:"Koga Yūsei Yondan ga Kesshō Shinshutsu Hatashi Shīkyū Nikumi Shōkyū Furīkurasu kara Jūninme"
1195:
919:
505:"Dai Rokujūgokai Shōreikai Sandan Rīgusen Nisenjūkyūnen Shigatsu kara Nisenjūkyūnen Kugatsu"
480:"Dai Rokujūnanakai Shōreikai Sandan Rīgusen Nisennijūnen Shigatsu kara Nisennijūnen Kugatsu"
267:
173:
95:
1311:
623:
610:"Tsumeshōgi Kaitō Senshuken Koga Rokudan ga Hatsu Yūshō Gorenpa no Fujii Meijin wa Fusanka"
1921:
1896:
583:
232:
203:. He was promoted to the rank of apprentice professional 3-dan in April 2017 and obtained
8:
1858:
1846:
1416:
1140:
994:
899:
889:
425:[New 4-dans announced] (in Japanese). Japan Shogi Association. September 26, 2020
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738:
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292:
200:
106:
1834:
1050:
350:[Professional Shogi Player Database: Yūsei Koga] (in Japanese).
1452:
843:
457:
1639:
1573:
1296:
126:
380:"Itō Takumi Toppu Tsūka, Tomita Seiya Shōdan Shōreikai Sandan Rīgu"
445:"Tomita, Koga ga Shin Shōgi Kishi Nishiyama wa Josei Hatsu Nogasu"
650:
185:
58:
219:
which gave him the option to enter the professional ranks as a
1687:
1663:
559:"Koga Yūsei Yodan, Furīkurasu kara Shikyū Nikumi e Shōkyū"
179:
199:
in
September 2011 as a protegee of shogi professional
685:
1917:Professional shogi players from Fukuoka Prefecture
622:
286:
1883:
161:
155:
1866:
671:
323:(April 2019 – September 2019).
584:"Kishi Dētabēsu: Koga Yūsei Shōdan Rireki"
1873:
1859:
678:
664:
607:
231:In September 2021, Koga was promoted to
414:
412:
410:
408:
406:
239:7-dan to reach the finals of the 52nd
1884:
651:Professional Player Info · Koga, Yusei
180:Early life and apprentice professional
659:
374:
372:
370:
368:
226:
1829:
403:
253:
608:Maruyama, Susumu (March 31, 2024).
13:
365:
211:after finishing third in the 67th
14:
1933:
686:Active professional shogi players
643:
532:古賀悠聖四段が決勝進出果たしC級2組昇級 フリークラスから10人目
391:(in Japanese). September 26, 2020
291:In March 2024, Koga won the 21st
1912:Sportspeople from Fukuoka (city)
1841:This shogi-related article is a
1833:
539:(in Japanese). September 8, 2021
420:"Shin Yonden Tanjō no Oshirase"
1907:Japan Shogi Association players
601:
576:
293:Tsume Shogi Solving Competition
287:Tsume Shogi Solving Competition
612:詰将棋解答選手権 古賀六段が初優勝 5連覇の藤井名人は不参加
551:
522:
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472:
437:
337:
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1:
621:(in Japanese). Archived from
507:第65回奨励会三段リーグ戦 2019年4月～2019年9月
482:第67回奨励会三段リーグ戦 2020年4月～2020年9月
345:"Kishi Dētabēsu: Koga Yūsei"
330:
1845:. You can help Knowledge by
71:Achieved professional status
7:
945:Hiroshi Kobayashi (b. 1976)
162:
10:
1938:
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1726:
1705:
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1038:
862:
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382:伊藤匠トップ通過, 冨田誠也昇段 奨励会三段リーグ
170:professional shogi player
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36:
26:
21:
611:
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481:
446:
421:
381:
346:
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262:for Koga is as follows.
205:full professional status
561:古賀悠聖四段, フリークラスからC級2組へ昇級
352:Japan Shogi Association
193:Japan Shogi Association
1902:Japanese shogi players
276:4-dan: October 1, 2020
1699:Lifetime titleholders
447:冨田, 古賀が将棋棋士に 西山は女性初逃す
279:5-dan: March 14, 2023
16:Japanese shogi player
1628:Current titleholders
460:. September 26, 2020
282:6-dan: March 5, 2024
1292:Shin'ichirō Hattori
1141:Yoshiyuki Matsumoto
900:Kazushiza Horiguchi
890:Naruyuki Hatakeyama
586:棋士データベース: 古賀悠聖 昇段履歴
1768:Toshiyuki Moriuchi
1357:Kazuhiro Nishikawa
1101:Kiyokazu Katsumata
834:Masayuki Toyoshima
774:Toshiyuki Moriuchi
227:Shogi professional
166:, January 1, 2001)
1854:
1853:
1823:
1822:
1819:
1818:
1448:Yoshitaka Hoshino
1412:Masakazu Watanabe
1246:Takahiro Toyokawa
1030:Takayuki Yamasaki
1020:Masataka Sugimoto
885:Mamoru Hatakeyama
754:Tadahisa Maruyama
297:COVID-19 pandemic
273:3-dan: April 2017
260:promotion history
254:Promotion history
221:free class player
197:apprentice school
191:Koga entered the
184:Koga was born in
148:
147:
1929:
1875:
1868:
1861:
1837:
1830:
1703:
1702:
1589:Yūjirō Takahashi
1579:Ehoto Osogaguchi
1523:Hiroshi Yamamoto
1483:Hiroshi Miyamoto
1433:Tetsuya Fujimori
1417:Shin'ya Yamamoto
1367:Satoru Sakaguchi
1352:Ryōsuke Nakamura
1337:Mitsunori Makino
1266:Hiroaki Yokoyama
1251:Kazushi Watanabe
1186:Tatsuya Sanmaidō
1131:Yoshiyuki Kubota
1111:Kōichi Kinoshita
1106:Takeshi Kawakami
1096:Daisuke Katagami
1091:Hirotaka Kajiura
1056:Takanori An'yōji
975:Hiroshi Naganuma
965:Daisuke Nakagawa
960:Yasuaki Murayama
940:Kensuke Kitahama
854:Nobuyuki Yashiki
819:Michio Takahashi
789:Hisashi Namekata
759:Yoshikazu Minami
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673:
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627:on April 1, 2024
626:
618:Mainichi Shimbun
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270:: September 2011
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237:Hirotaka Kajiura
235:after defeating
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143:JSA profile page
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1623:
1614:Tomoki Yokoyama
1527:
1478:Takayuki Kuroda
1468:Wataru Kamimura
1438:Nagisa Fujimoto
1421:
1407:Hiromu Watanabe
1387:Hideyuki Takano
1302:Takashi Ikenaga
1270:
1256:Norihiro Yagura
1216:Kazuharu Shoshi
1181:Hiroshi Okazaki
1171:Takahiro Ōhashi
1156:Tomohiro Murata
1076:Shingo Hirafuji
1034:
985:Hirotaka Nozuki
980:Taichi Nakamura
950:Yasuhiro Masuda
915:Tetsurō Itodani
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839:Yasuaki Tsukada
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217:promotion point
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74:October 1, 2020
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47:January 1, 2001
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1788:Akira Watanabe
1785:
1778:Yasumitsu Satō
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1734:Yoshiharu Habu
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1604:Hirotoshi Ueno
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1569:Saito Morimoto
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1564:Kenta Miyajima
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1508:Akihiro Takada
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1503:Kazuo Sugimoto
1500:
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1488:Takuya Nishida
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1458:Kenji Imaizumi
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1372:Shin'ichi Satō
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1362:Takehiro Ōhira
1359:
1354:
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1342:Akihiro Murata
1339:
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1317:Keita Kadokura
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1307:Naohiro Ishida
1304:
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1287:Wakamu Deguchi
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1261:Wataru Yashiro
1258:
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1226:Issei Takazaki
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1201:Kazutoshi Satō
1198:
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1151:Shūji Muranaka
1148:
1146:Atsushi Miyata
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1121:Masakazu Kondō
1118:
1116:Tadao Kitajima
1113:
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1000:Keiichi Sanada
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995:Shintarō Saitō
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829:Eisaku Tomioka
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814:Daisuke Suzuki
811:
806:
804:Manabu Senzaki
801:
799:Yasumitsu Satō
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784:Osamu Nakamura
781:
776:
771:
769:Taku Morishita
766:
764:Hiroyuki Miura
761:
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746:
741:
736:
734:Akihito Hirose
731:
729:Yoshiharu Habu
726:
721:
719:Bungo Fukusaki
716:
714:Kōichi Fukaura
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644:External links
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347:棋士データベース: 古賀悠聖
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1231:Kōsuke Tamura
1229:
1227:
1224:
1222:
1221:Taichi Takami
1219:
1217:
1214:
1212:
1211:Shingo Sawada
1209:
1207:
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1199:
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1196:Makoto Sasaki
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1191:Daichi Sasaki
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1176:Tadashi Ōishi
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1166:Takuma Oikawa
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1081:Kentarō Ishii
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1015:Tatsuya Sugai
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990:Hisashi Ogura
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935:Kenji Kanzaki
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920:Hiroki Iizuka
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827:
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824:Kōji Tanigawa
822:
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815:
812:
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779:Takuya Nagase
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750:
749:Toshiaki Kubo
747:
745:
744:Kazuki Kimura
742:
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735:
732:
730:
727:
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724:Masataka Gōda
722:
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712:
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709:Takeshi Fujii
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537:Nikkan Sports
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453:Tokyo Shimbun
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388:Nikkan Sports
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209:rank of 4-dan
206:
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177:
175:
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164:
152:
144:
140:
135:
131:
128:
124:
120:
117:
113:
110: (8-dan)
108:
104:
100:
97:
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89:
85:
81:
73:
69:
64:
60:
57:
53:
49:(age 23)
39:
35:
29:
25:
20:
1847:expanding it
1840:
1825:
1809:
1805:
1795:
1791:
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1757:
1753:
1749:
1745:
1741:
1737:
1716:
1686:
1674:
1668:
1662:
1656:
1650:
1644:
1638:
1559:Kanta Masegi
1549:Naoki Koyama
1518:Seiya Tomita
1443:Kōhei Hasebe
1377:Shōji Segawa
1347:Yūya Nagaoka
1332:Reo Kurosawa
1326:
1241:Ryūma Tonari
1206:Shin'ya Satō
1161:Akira Nishio
955:Ayumu Matsuo
925:Masaki Izumi
895:Ichirō Hiura
875:Kōzō Arimori
794:Amahiko Satō
629:. Retrieved
624:the original
616:
603:
591:. Retrieved
578:
566:. Retrieved
553:
541:. Retrieved
536:
524:
512:. Retrieved
499:
487:. Retrieved
474:
462:. Retrieved
451:
439:
427:. Retrieved
393:. Retrieved
386:
355:. Retrieved
339:
321:3-dan League
315:
290:
257:
230:
213:3-dan League
190:
183:
150:
149:
83:Badge Number
76:(2020-10-01)
1922:Shogi stubs
1897:2001 births
1539:Akihiro Ida
1498:Asuto Saitō
1493:Shōgo Orita
1473:Yūta Komori
1236:Makoto Tobe
1136:Yūji Masuda
1126:Seiya Kondō
1066:Kōhei Funae
1061:Sakio Chiba
1046:Kenjirō Abe
1005:Yūki Sasaki
970:Isao Nakata
910:Akira Inaba
905:Eiji Iijima
880:Shōta Chida
809:Akira Shima
739:Keita Inoue
699:Takashi Abe
244: [
201:Isao Nakata
107:Isao Nakata
27:Native name
1886:Categories
1802:Sōta Fujii
1727:Qualifying
1683:Takumi Itō
1635:Sōta Fujii
1584:Yūya Saitō
1554:Reo Koyama
1453:Junpei Ide
1327:Yūsei Koga
1322:Kōta Kanai
1312:Shingo Itō
1086:Takumi Itō
1010:Shūji Satō
844:Kenji Waki
704:Sōta Fujii
649:ShogiHub:
568:October 4,
543:October 4,
514:October 3,
489:October 3,
464:October 3,
458:Kyodo News
429:October 3,
422:新四段誕生のお知らせ
395:October 3,
357:October 3,
331:References
301:Sōta Fujii
163:Koga Yūsei
151:Yūsei Koga
43:2001-01-01
22:Yūsei Koga
1574:Reo Okabe
1297:Kei Honda
241:Shinjin-Ō
172:ranked 6-
1051:Kōru Abe
593:April 5,
207:and the
137:Websites
55:Hometown
1706:Awarded
186:Fukuoka
102:Teacher
61:, Japan
59:Fukuoka
1772:Meijin
1746:Meijin
1717:Meijin
1646:Meijin
631:May 2,
116:Meijin
66:Career
1806:Kisei
1782:Kisei
1742:Kisei
1676:Kisei
1532:4-dan
1426:5-dan
1275:6-dan
1039:7-dan
863:8-dan
692:9-dan
307:Notes
248:]
157:古賀 悠聖
129:class
118:class
1843:stub
1808:and
1796:Ryūō
1794:and
1762:Ryūō
1760:and
1754:Ōshō
1673:and
1670:Ōshō
1640:Ryūō
633:2024
595:2024
570:2021
545:2021
516:2020
491:2020
466:2020
431:2020
397:2020
359:2020
258:The
127:Ryūō
91:Rank
37:Born
31:古賀悠聖
1792:Kiō
1758:Ōza
1738:Kiō
1688:Eiō
1664:Kiō
1658:Ōza
268:kyū
195:'s
174:dan
96:dan
86:326
1888::
1810:Ōi
1756:,
1752:,
1750:Ōi
1748:,
1744:,
1740:,
1667:,
1661:,
1655:,
1652:Ōi
1649:,
1643:,
405:^
367:^
299:.
266:6-
246:ja
176:.
160:,
121:B2
94:6-
45:)
1874:e
1867:t
1860:v
1849:.
1812:)
1804:(
1798:)
1790:(
1784:)
1780:(
1774:)
1770:(
1764:)
1736:(
1719:)
1715:(
1691:)
1685:(
1679:)
1637:(
679:e
672:t
665:v
635:.
597:.
572:.
547:.
518:.
493:.
468:.
433:.
399:.
361:.
154:(
132:6
41:(
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