commit 0d47d6596136b5b6d57ca0aed2df67f6b6e4f29b
Author: Jun Kuriyama <kuriyama@s2factory.co.jp>
Date:   Tue Aug 9 11:32:18 2016 +0900

    Add yama no hi (8/11).

diff --git a/lib/Date/Japanese/Holiday.pm b/lib/Date/Japanese/Holiday.pm
index b4f7c42..fc1bfb8 100644
--- lib/Date/Japanese/Holiday.pm
+++ lib/Date/Japanese/Holiday.pm
@@ -21,6 +21,7 @@ use constant FIRST_DAY => 2432753;
     '05-03' => [FIRST_DAY, 0],
     '05-05' => [FIRST_DAY, 0],
     '07-20' => [2450084, 2452640],
+    '08-11' => [2457611, 0],
     '09-15' => [2439302, 2452640],
     '10-10' => [2439302, 2451544],
     '11-03' => [FIRST_DAY, 0],