Oshiri Kajiri Mushi (TV) 4th Season (おしりかじり虫) is fourth season of Oshiri Kajiri Mushi, a Japanese anime TV series that first aired in 2012. Title: Oshiri Kajiri Mushi (TV) 4th Season English: Bottom Biting Bug 4 Japanese: おしりかじり虫 第4シリーズ Type: TV Episodes: Unknown First Aired: October 5, 2015 Season: Fall 2015 Producers: NHK, Kinema Citrus, NHK