The “Haseshin POP UP SHOP,” celebrating the birthday of game streamer Haseshin, will be held at the IP Bookstore on the 6th floor of SHIBUYA TSUTAYA starting October 30, 2026! New, original Halloween-themed illustrations will be unveiled, and in addition to merchandise such as acrylic stands, sets of five pin badges, and T-shirts, customers will receive a postcard with every purchase of 2,200 yen or more (tax included).