The 4th Japanese Culture Class 2011 "Japanese drum" was held on August 11 and 17. Eleven participants enjoyed Wadaiko lesson, though some had sore muscles or got blisters.

As the final lesson, participants had a Wadaiko-performance at Ninomiya House Summer Festival on 19 August. When they started practicing, they were struggling to keep their rhythm. However, by their private practice and by watching Wadaiko-performance on youtube, they made enough progress for a great drumming performance at the festival.