Portal:Anime and manga/Anniversaries/January/January 20

January 20:

Manga serialization
 * 2004 – Mugen Spiral by Mizuho Kusanagi begins serialization in Hana to Yume
 * 2006 – Densha Otoko by Hitori Nakano finishes serialization in Weekly Shōnen Champion

Television series and specials
 * 2000 – Now and Then, Here and There finishes airing on WOWOW
 * 2004 – Kita e: Diamond Daydreams begins airing on AT-X