Rating › Ao Kokubo

Rating of Ao Kokubo

Player page　Last game 2026-10-22

Current rating1597

Peak1608
2026-09-03

Games23

By fiscal year

FY	Age	Annual rank	Rank	Junisen	Rating	Change	W	L	Win rate
FY2026	age 21	95th	4-dan	Class C2	1597	+53	14	4	0.778
FY2025	age 20	123rd	3-dan		1544	-19	0	2	0.000
FY2024	age 19	115th	3-dan		1563	-6	0	1	0.000
FY2023	age 18	112th	3-dan		1569	-14	0	1	0.000
FY2022	age 17	106th	3-dan		1582	-8	0	1	0.000

Games by fiscal year

FY2026 results14W-4L

Win rate0.778

Rating1597

Annual rank95th

Rank/title at FY end / age4-dan / age 21

No	Date	Before	Change	After	Opponent (before game)	Tournaments	Side	Result
1	6/11	1534	+11	1545	Naohiro Ishida6-dan / age 37 1681	Junisen Class C2 Round 1	Sente	○
2	6/17	1545	+4	1549	Eisaku Tomioka9-dan / age 62 1363	Kisei-sen Prelim 1 Round 1	Gote	○
3	6/17	1545	+5	1550	Takahiro Toyokawa7-dan / age 59 1382	Kisei-sen Prelim 1 Round 2	Sente	○
4	7/9	1554	+8	1562	大島綾華 1559	Kakogawa Seiryu-sen Main Round 2	Gote	○
5	7/11	1562	+4	1566	大島一馬アマ 1345	Amateur	Gote	○
6	7/11	1562	+4	1566	大島一馬アマ 1345	Asahi Cup Prelim 1 Round 1	Gote	○
7	7/16	1569	+7	1576	Yoshitaka Hoshino5-dan / age 37 1510	Junisen Class C2 Round 2	Gote	○
8	8/6	1576	+5	1581	Wataru Kamimura5-dan / age 39 1457	Junisen Class C2 Round 3	Sente	○
9	8/13	1581	-6	1575	Hiroaki Yokoyama7-dan / age 45 1656	Asahi Cup Prelim 1 Round 2	Sente	●
10	8/20	1575	+9	1584	Eiji Iijima8-dan / age 46 1622	Kisei-sen Prelim 1 Round 3	Gote	○
11	8/20	1575	+10	1585	Kouru Abe7-dan / age 31 1655	Kisei-sen Prelim 1 Final	Sente	○
12	8/27	1594	+11	1604	Kei Honda6-dan / age 29 1720	Junisen Class C2 Round 4	Sente	○
13	9/3	1604	+3	1608	Eisaku Tomioka9-dan / age 62 1356	Oza-sen Prelim 1 Round 1	Sente	○
14	9/15	1608	-9	1599	Rintarou Iwamura4-dan / age 20 1581	Eio-sen 4-dan section Round 1	Gote	●
15	9/24	1599	+5	1604	Yoshiyuki Matsumoto7-dan / age 54 1447	Oi-sen Prelims Round 1	Gote	○
16	10/7	1604	-4	1599	Asuto Saito6-dan / age 28 1783	Oi-sen Prelims Round 2	Gote	●
17	10/16	1599	-9	1590	Ehoto Osogaguchi4-dan / age 26 1549	Oza-sen Prelim 1 Round 2	Gote	●
18	10/22	1590	+7	1597	Shingo Itoh6-dan / age 44 1547	Junisen Class C2 Round 6	Gote	○

FY2025 results0W-2L

Win rate0.000

Rating1544

Annual rank123rd

Rank/title at FY end / age3-dan / age 20

No	Date	Before	Change	After	Opponent (before game)	Tournaments	Side	Result
1	5/29	1558	-7	1551	Jodai Furui3-dan / age 20 1612	Kakogawa Seiryu-sen Main Round 2	Gote	●
2	12/12	1551	-7	1544	Shota Kunii3-dan / age 16 1594	Shinjin-o-sen Main Round 1	Sente	●

FY2024 results0W-1L

Win rate0.000

Rating1563

Annual rank115th

Rank/title at FY end / age3-dan / age 19

No	Date	Before	Change	After	Opponent (before game)	Tournaments	Side	Result
1	3/24	1567	-4	1563	Hirotoshi Ueno5-dan / age 21 1753	Shinjin-o-sen Main Round 2	Gote	●

FY2023 results0W-1L

Win rate0.000

Rating1569

Annual rank112th

Rank/title at FY end / age3-dan / age 18

No	Date	Before	Change	After	Opponent (before game)	Tournaments	Side	Result
1	3/1	1576	-7	1569	Naoki Koyama4-dan / age 24 1606	Shinjin-o-sen Main Round 2	Gote	●

FY2022 results0W-1L

Win rate0.000

Rating1582

Annual rank106th

Rank/title at FY end / age3-dan / age 17

No	Date	Before	Change	After	Opponent (before game)	Tournaments	Side	Result
1	11/15	1590	-8	1582	Shiryu Katayama3-dan / age 18 1593	Shinjin-o-sen Main Round 1	Gote	●

Unofficial Elo rating calculated by this site from available game results (each fiscal year is shifted so that the average player is 1600). Up to FY1963 only Junisen games are included; from FY1964 all official games. Games without dates are ordered by estimated term and round.Method
How the deviation score is calculated: see here.