Falcom has revealed that they will be closing the mail order shop from 8/11 ~ 8/16 for summer break. There will be delays in responses to emails and faxes, and they will not be able to do any sort of inventory updates on the site until after the break.
The online store will resume its regular activities on 8/17.
As for the rest of the company, their currently holiday structure is listed on the Falcom Calendar page. The offices will be closed on both 8/11 and 8/15, with regular operation between.