Japan Open 2023


The registration has finished due to the max in the number of participants, on Sep 10th.

Additional participants were added on October, 23rd.




  • Dates:Thurs, Nov 2nd, 2023 – Sun, Nov 5th, 2023
  • Venue:Shinagawa Ward Small and Medium Enterprise Center 3F, Main Conference Room
    1-28-3, Nishi-Shinagawa, Shinagawa Ward, Tokyo (Map
  • Format:7R Swiss, 90min+30sec/move, National & FIDE Rated



  • Entry Criteria:Annual Members of the Japan Chess Federation (One-time Tournament Members are eligible only for players from outside Japan.)
  • Entry Fee:10,000 Yen
    U22:7,000 Yen(GM: Free, IM: 5,000 Yen)
    *U22 refers to players who have not reached the age of 22 by January 1, 2023, and were born in and after 2001.
  • Registration:Purchase tickets through [Peatix] during the registration period.(Only – 114 spots)
  • Entries are accepted:Between 18:00 on Friday, August 25th to 23:59 on Monday, October 30th



Thursday, November 2nd

12:00-12:40  Check-in

12:40  Opening Ceremony

13:00  R1


Friday (Holiday), November 3rd

10:00  R2

15:00  R3


Saturday, November 4th

10:00  R4

15:00  R5


Sunday, November 5th

10:00  R6

15:00 R7

19:30  Prize Giving

11/1 The start time of Prize Giving was changed from 19:00 to 19:30. 



  • 1st-50,000 Yen、2nd-40,000 Yen、3rd-30,000 Yen、4th-20,000 Yen、5th-10,000 Yen
  • Plates are given to top 5 finishers of OPEN, top 3 finishers of U1800, top women player, and top youth player.
  • Chessmood Prizes are given to 2 participants at the Prize Giving by lottery, as well as the top 5 finishers of OPEN and top 3 of U1800
  • Qualifying for Japan Chess Championship:Top 5 finishers in this tournement will be qualified for Japan Chess Championship 2024
  • Tie-breakers will be used to determine the ranking, and prize money will not be shared among players with the same points.


Other Regulations

Tournament Rules

  • Tie-breaks:
  1. Buchholz Cut-1 (Sum of the opponents’ points excluding the lowest)
  2. Buchholz (Sum of the opponents’ points)
  3. Sonneborn-Berger (Sum of the defeated opponents’ points and halves of drawn opponents’ points)
  4. Sum of the ratings of the opponents
  5. Drawing of lots
  • Default time: If any player is not present within 30 min after the game starts, she/he shall lose the game by default. The game is not rated.
  • Pre-registered byes: Bye requests will be accepted until 18:00 on the day before the tournament by filling in the Bye Request Form.  0.5 points will be awarded for pre-requested Byes, and 0 points for Bye requested after the deadline. The requested Bye for the final 2 rounds shall be given 0 points.  If a player has more than 1 requested byes, the player will not qualify for prizes, nor qualify for Japan Chess Championship 2024.
  • Pairing-allocated bye will be one point.
  • Pairings of the first round will be published at 20:00 on the day before the tournament.
  • The organizer will provide chess equipment including clocks and score sheets. Players must use them.
  • Players need to record moves. Once the game is finished, both players sign both score sheets and hand over the original score sheets to the arbiters. Make sure the results are correct before signing.
  • All electronic devices including smartphones, tablets or smartwatches must be turned off and stored away. Players are not allowed to keep it on him/her or take it outside of the venue in a bag. When a player breaks these rules, his/her game shall be immediately lost. It is forbidden for anybody to use a mobile phone or any kind of communication device in the playing venue.
  • The pairings will be done in order of the FIDE ratings, the National ratings, titles, and the alphabetical order of the players.
  • The tournament will follow FIDE rules unless otherwise stated above.  For example, an illegal move will be penalized and the second illegal move will result in the loss of the game. Pressing the clock by mistake or pressing it with the other hand which touched the pieces will also be judged as an illegal move.


Media Related Rules

  • The tournament results will be posted on the Internet (chess-results.com) for reporting purposes. The game record may also be published on the Internet. Participants agree to the publication of their real names, results, and game records.
  • Observers are allowed to take photos for the first 10 minutes of each round.  No photos are allowed after 10 minutes, except for the case with special permission.
  • Individuals who wish to use photos or videos of participants (during games, award ceremonies, etc.) must be careful to protect their privacy.  In addition to obtaining comprehensive consent in advance, for example, in the case of minors, the permission of their guardians must be obtained, and due consideration must be given to the protection of personal information and portrait rights.
  • The organizer will take photos, record videos, and broadcast the event live. These may be published and used in media such as websites, SNS, video sites, and journals managed by the Japan Chess Federation. Participants shall agree to the publication and live broadcast of these photos and videos.

COVID-19 Related Rules

  • All players have to follow the COVID-19 Guidelines 4th Edition.


Other Rules

  • The organizer reserves the right for changing the above rules with adequate reason before the first round starts.
  • Due to the spread of coronavirus infection or other unforeseeable reasons, there may be unavoidable changes to the duration of the rounds or the event may be canceled.
  • Cancellation must be noticed to japanchess.info@gmail.com.
  • Japan Chess Federation shall not be responsible for any troubles between individuals.
  • If there is a discrepancy between English and Japanese, the Japanese version prevails.



Japan Chess Federation







Chess-results (participants list)

COVID-19 Guidelines 4th Edition