Saturday and Sunday games were canceled due to rains caused by Typhoon eleven. The tournament is currently scheduled to begin on the 11th.
This was the third time in tournament history the opening ceremony had to be postponed. The other two times: 1920 and 1960. This was the first time the first two days of the tournament had to be postponed. (ZakZak 8/9/2014)
The tournament schedule has been updated accordingly.
[UPDATE 8/10 @ 7:23pm]
The Japan High School Baseball Federation announced on Sunday that the tournament will begin on Monday as planned. Gates will open at 7:00am. The opening ceremony will begin at 9:00am. The JHBF did warn that the start of the tournament could be delayed based on traffic/transportation conditions.
Source: Nikkan Sports 8/10/2014