The bad weather conditions followed by rain and thunders obstructed the Sunday seminar Sui Ren, so it was replaced with an intensive training for Iaijutsu (fast drawing and simultaneous cutting with a samurai sword).
The Saturday seminar for bow and arrow (Yumi Ya) was somewhat successful, although the rain that fell during the weekend changed the schedule constantly.
So, the students managed to pass the training for crafting a bow and arrow, however, the studying of the techniques for shooting one were prevented from the lightnings and the rain.
It has come to an agreement this two arts to be taught during the Summer Ninja Camps in August, so these kind of blockages not to happen in the future.