Tickets for the 107th National High School Baseball Championship Aichi Tournament. Selling a set of 4 tickets. 107th National High School Baseball Championship Aichi Tournament Dates: June 28th (Saturday) - July 27th (Sunday) Opening Ceremony: June 27th (Friday) Rain Dates: July 28th (Monday), 29th (Tuesday) Organizer: Aichi Prefecture High School Baseball Federation These are admission tickets for the 107th National High School Baseball Championship Aichi Tournament. They are valid for one day only during the tournament, excluding the final game. Please check the details on the ticket itself.