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Naoki Koyama

Player No.336
Rank4-dan
Date of birthOct 7, 1999
BirthplaceTokyo
TeacherMakoto Tobe 7-dan
Junisen terms4
Career record17W-19L
Win rate0.472
Deviation score (FY2025)50.0
Best deviation score50.7
FY2023

Rating history and all games →

Junisen record

TermClassRankRecordUp/downDeviation
85th termClass C2251W-5L
84th termClass C2306W-4L50.0
83rd termClass C2305W-5L46.6
82nd termClass C2545W-5L50.7

How the deviation score is calculated: see here.

Terms in each class

Class C24 terms

Promotion history

Apr 1, 20234-dan
Sep 20173-dan

Best wins (highest-rated opponents)

Aug 3, 2023Daichi Sasaki 1876Junisen
Jan 9, 2025Wataru Yashiro 1859Junisen
Jun 13, 2024Satoshi Takano 1757Junisen
Feb 25, 2026Ryuma Yoshiike 1754Ryuo-sen
May 1, 2025Kazuki Kimura 1733Kio-sen

Career wins and ratings are counted from the games recorded on this site (official games from FY1964, and Junisen games before that) and may differ from official records.

Frequent opponents

Ryuma Yoshiike2W-3LHead-to-head
Taiki Yamakawa2W-2LHead-to-head
Michio Takahashi2W-1LHead-to-head
Hisashi Namekata2W-1LHead-to-head
Shinya Satoh2W-1LHead-to-head
Shingo Itoh3W-0LHead-to-head
Hirotaka Kajiura0W-3LHead-to-head
Satoshi Takano2W-1LHead-to-head
Reo Okabe0W-3LHead-to-head
Yujirou Takahashi1W-2LHead-to-head
Koichi Fukaura1W-1LHead-to-head
Kiyokazu Katsumata2W-0LHead-to-head

Head-to-head with other players →