Original source: http://www.jang-keunsuk.jp/cri_4_2017/#goods
The official goods are sold at each venue at 12:00.
*T-shirt: 2,500 yen
*Jang Keun Suk special penlight: 6,000 yen
*Towel made by IMABARI: 2,500 yen
*Marble bracelet made of silicon: 1,500 yen (4 types of all, but sold at random)
*Pocketable bag: 3,000 yen
*Candy can with a random ring: 1,500 yen
*Travel stickers: 2,000 yen (5 pieces as a set, 5 types of all)
*Travel set: 3,000 yen (pouch & toothbrush set)