https://kotaku.com/rurouni-kenshin-creator-charged-with-possessing-child-p-1820633519

"Nobuhiro Watsuki, creator of the hit manga Rurouni Kenshin, has been charged with possession of child pornography. According to the Yomiuri Shimbun, investigators discovered several DVDs that showed nude under-15 year-old girls at Watsuki’s Tokyo office. Similar DVDs were also reportedly found at his house."

"Watsuki is quoted as telling authorities, “I liked girls from the upper grades of elementary school to around the second year of junior high school.”

Rurouni Kenshin has sold over 70 million copies and went on to spawn a hit anime and several live-action films. This is related to pizzagate because it's a very popular author being connected to child porn.