otaku republic is the largest doujinshi online shop. over 1,000,000 doujinshi and doujin items.
pixiv is an illustration communication service where people can post, read, and view illustrations, manga, and novels.
enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on youtube.
aocs.jp Top 5 competitors are archiveofourown.org, otakurepublic.com, pixiv.net, toranoana.jp, youtube.com